diff --git a/BUILD.gn b/BUILD.gn
index 6ae8bd57bce115893f5a2d56493d5058dd126cbb..06480b60feff7f5d5da656a36f9b2246a6e9db40 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -12,9 +12,6 @@ if (skia_feature_upgrade) {
   import("m133/gn/shared_sources.gni")
   import("m133/gn/skia.gni")
   import("m133/gn/toolchain/wasm.gni")
-  if (is_arkui_x) {
-    import("//foundation/arkui/ace_engine/ace_config.gni")
-  }
 }
 if (!skia_feature_upgrade) {
 import("gn/flutter_defines.gni")
@@ -1456,21 +1453,16 @@ optional("gpu") {
 optional("gif") {
   enabled = !skia_use_wuffs && skia_use_libgifcodec
   _libgifcodec_gni_path = "third_party/externals/libgifcodec/libgifcodec.gni"
-  if ("True" ==
-      exec_script("gn/checkpath.py",
-                  [ rebase_path(_libgifcodec_gni_path, root_build_dir) ],
-                  "trim string")) {
-    public_defines = [ "SK_USE_LIBGIFCODEC" ]
-    public_include_dirs = [
-      ".",
-      skia_libgifcodec_path,
-    ]
-    include_dirs = public_include_dirs
-    import(_libgifcodec_gni_path)
-    sources = rebase_path(libgifcodec_sources + libgifcodec_public,
-                          ".",
-                          skia_libgifcodec_path)
-  }
+  public_defines = [ "SK_USE_LIBGIFCODEC" ]
+  public_include_dirs = [
+    ".",
+    skia_libgifcodec_path,
+  ]
+  include_dirs = public_include_dirs
+  import(_libgifcodec_gni_path)
+  sources = rebase_path(libgifcodec_sources + libgifcodec_public,
+                        ".",
+                        skia_libgifcodec_path)
 }
 
 optional("heif") {
@@ -2348,19 +2340,6 @@ if (use_oh_skia) {
       }
     }
   }
-  if (is_arkui_x) {
-    foreach(item, ace_platforms) {
-      make_skia_deps(item.name) {
-        platform = item.name
-        config = {
-        }
-
-        if (defined(item.config)) {
-          config = item.config
-        }
-      }
-    }
-  }
 }
 
 # DebugCanvas used in experimental/wasm-skp-debugger
@@ -2610,16 +2589,8 @@ if (skia_enable_tools) {
         extra_configs = [ ":skia_private" ]
         launchscreen = "platform_tools/ios/app/LaunchScreen.storyboard"
         data_sources = [ "resources" ]
-        if ("True" == exec_script("${skia_root_dir}/gn/checkdir.py",
-                                  [ rebase_path("skps", root_build_dir) ],
-                                  "trim string")) {
-          data_sources += [ "skps" ]
-        }
-        if ("True" == exec_script("${skia_root_dir}/gn/checkdir.py",
-                                  [ rebase_path("mskps", root_build_dir) ],
-                                  "trim string")) {
-          data_sources += [ "mskps" ]
-        }
+        data_sources += [ "skps" ]
+        data_sources += [ "mskps" ]
       }
     } else {
       # !is_ios
diff --git a/build/fuchsia/BUILD.gn b/build/fuchsia/BUILD.gn
index 1672c26b346e605f50bd53aae71c68c5164f681d..d2bc2a3a95ed04ded500dc175d424ea69dc62884 100644
--- a/build/fuchsia/BUILD.gn
+++ b/build/fuchsia/BUILD.gn
@@ -7,18 +7,6 @@ assert(is_fuchsia)
 import("${skia_root_dir}/build/fuchsia/sdk.gni")
 
 fuchsia_sdk_manifest_exists = false
-if (is_fuchsia && using_fuchsia_sdk) {
-  manifest_exists = exec_script("${skia_root_dir}/build/fuchsia/file_exists",
-                                [
-                                  "-file_name",
-                                  rebase_path(fuchsia_sdk_manifest_path),
-                                ],
-                                "list lines",
-                                [ "${skia_root_dir}/build/fuchsia/file_exists" ])
-  if (manifest_exists == [ "true" ]) {
-    fuchsia_sdk_manifest_exists = true
-  }
-}
 
 group("fuchsia") {
   if (fuchsia_sdk_manifest_exists == true) {
diff --git a/build/fuchsia/fuchsia_download_sdk.gni b/build/fuchsia/fuchsia_download_sdk.gni
index 2fa71218f207ad089e884d48c426d771a7952cea..b655a95b94218d4fca0569f76716135cd5ccdf50 100644
--- a/build/fuchsia/fuchsia_download_sdk.gni
+++ b/build/fuchsia/fuchsia_download_sdk.gni
@@ -8,14 +8,4 @@ import("../../gn/skia.gni")
 if (is_fuchsia && skia_update_fuchsia_sdk &&
     current_toolchain == default_toolchain) {
   cipd_dir = "${fuchsia_sdk_path}/../cipd"
-  update_sdk_out = exec_script(
-          "${skia_root_dir}/build/fuchsia/update_fuchsia_sdk",
-          [
-            "-sdk_dir=" + rebase_path(fuchsia_sdk_path),
-            "-clang_dir=" + rebase_path(fuchsia_toolchain_path),
-            "-cipd_cache_dir=" + rebase_path(cipd_dir),
-            "-cipd_clang_version=git_revision:a6e1de4afc51560df18c95cb616dec51248ed660",
-          ],
-          "list lines",
-          [ "${skia_root_dir}/build/fuchsia/update_fuchsia_sdk" ])
 }
diff --git a/gn/BUILDCONFIG.gn b/gn/BUILDCONFIG.gn
index e700512529dab3ffcdf6418df3264b44a6e51a81..6cca4b8a3de136c6f87fd82d61462beef661ec0e 100644
--- a/gn/BUILDCONFIG.gn
+++ b/gn/BUILDCONFIG.gn
@@ -66,14 +66,6 @@ if (current_cpu == "") {
 
 is_clang = is_android || is_ios || is_mac || is_fuchsia ||
            (cc == "clang" && cxx == "clang++") || clang_win != ""
-if (!is_clang && !is_win) {
-  is_clang = exec_script("${skia_root_dir}/gn/is_clang.py",
-                         [
-                           cc,
-                           cxx,
-                         ],
-                         "value")
-}
 
 if (is_android) {
   ndk_host = ""
@@ -107,41 +99,10 @@ if (target_os == "win") {
   # By default we look for 2017 (Enterprise, Pro, and Community), then 2015. If MSVC is installed in a
   # non-default location, you can set win_vc to inform us where it is.
 
-  if (win_vc == "") {
-    win_vc = exec_script("${skia_root_dir}/gn/find_msvc.py", [], "trim string")
-  }
   assert(win_vc != "")  # Could not find VC installation. Set win_vc to your VC
                         # directory.
 }
 
-if (target_os == "win") {
-  if (win_toolchain_version == "") {
-    win_toolchain_version =
-        exec_script("${skia_root_dir}/gn/highest_version_dir.py",
-                    [
-                      "$win_vc/Tools/MSVC",
-                      "[0-9]{2}\.[0-9]{2}\.[0-9]{5}",
-                    ],
-                    "trim string")
-  }
-  if (win_sdk_version == "") {
-    win_sdk_version = exec_script("${skia_root_dir}/gn/highest_version_dir.py",
-                                  [
-                                    "$win_sdk/Include",
-                                    "[0-9]{2}\.[0-9]\.[0-9]{5}\.[0-9]",
-                                  ],
-                                  "trim string")
-  }
-  if (clang_win != "" && clang_win_version == "") {
-    clang_win_version =
-        exec_script("${skia_root_dir}/gn/highest_version_dir.py",
-                    [
-                      "$clang_win/lib/clang",
-                      "[0-9]+\.[0-9]+\.[0-9]+",
-                    ],
-                    "trim string")
-  }
-}
 
 set_defaults("source_set") {
   configs = []
diff --git a/gn/skia/BUILD.gn b/gn/skia/BUILD.gn
index ba0e28c91826f758d5348c91d407fda7474ad58a..a8f3224947c1994ecc989fc495fd001fc035d85d 100644
--- a/gn/skia/BUILD.gn
+++ b/gn/skia/BUILD.gn
@@ -35,18 +35,12 @@ if (is_ios && xcode_sysroot == "") {
       sdk = "iphonesimulator"
     }
   }
-  xcode_sysroot =
-      exec_script("../find_xcode_sysroot.py", [ sdk ], "trim string")
 }
 
 # If building for mac on a mac then lookup all the system includes so that goma and the clang
 # shipped with chrome can find them. When the gn_to_bp.py tool is run, then the host_os != mac.
 # In this case leave the xcode_sysroot empty, and the cc/c++ that come with XCode will be able to
 # find needed include paths.
-if (is_mac && host_os == "mac" && xcode_sysroot == "") {
-  xcode_sysroot =
-      exec_script("../find_xcode_sysroot.py", [ "macosx" ], "trim string")
-}
 
 config("default") {
   asmflags = []
diff --git a/gn/toolchain/BUILD.gn b/gn/toolchain/BUILD.gn
index 718091d3db950b7c5a0c144af9fc59da0a20d4ae..5cc68f7341a2610b91dc615b69df36006af8b49f 100644
--- a/gn/toolchain/BUILD.gn
+++ b/gn/toolchain/BUILD.gn
@@ -42,7 +42,6 @@ declare_args() {
   # large -j to Ninja (e.g. Goma build). Unfortunately this is also one of the
   # slowest steps in a build, so we don't want to limit too much. Use the number
   # of CPUs as a default.
-  dlsymutil_pool_depth = exec_script("num_cpus.py", [], "value")
 
   # Too many linkers running at once causes issues for some builders. Allow
   # such builders to limit the number of concurrent link steps.
@@ -70,11 +69,7 @@ if (current_toolchain == default_toolchain) {
   }
   if (0 <= link_pool_depth) {
     pool("link_pool") {
-      if (link_pool_depth == 0) {
-        depth = exec_script("num_cpus.py", [], "value")
-      } else {
-        depth = link_pool_depth
-      }
+      depth = link_pool_depth
     }
   }
 }
diff --git a/third_party/externals/angle2/BUILD.gn b/third_party/externals/angle2/BUILD.gn
index 41c0e3ea4342f8444aa9ab02dd833a5857f92ce2..5a1acd10c8ab5b82e453d1c663d84f15d81fe025 100644
--- a/third_party/externals/angle2/BUILD.gn
+++ b/third_party/externals/angle2/BUILD.gn
@@ -249,8 +249,6 @@ if (_use_copy_compiler_dll) {
   # We also ship an older DLL for compatiblity with Windows 7 machines without
   # the UCRT. This DLL isn't available in the standard SDK distribution.
   _old_compiler = "$windows_sdk_path/Redist/D3D/$target_cpu/d3dcompiler_old.dll"
-  _has_old_compiler =
-      exec_script("scripts/file_exists.py", [ _old_compiler ], "value")
 
   copy("copy_compiler_dll") {
     sources = [ "$windows_sdk_path/Redist/D3D/$target_cpu/d3dcompiler_47.dll" ]
@@ -676,8 +674,7 @@ action("angle_commit_id") {
   visibility = [ ":angle_version" ]
 
   # Add git as a dependency if it is available.
-  if (angle_enable_commit_id &&
-      exec_script("src/commit_id.py", [ "check" ], "value") == 1) {
+  if (angle_enable_commit_id) {
     # commit id should depend on angle's HEAD revision
     inputs = [ ".git/HEAD" ]
     branch = read_file(".git/HEAD", "string")
@@ -687,12 +684,6 @@ action("angle_commit_id") {
 
       # If git has packed the contents of .git/refs/heads/ in .git/packed-refs,
       # unpack the head before depending on it.
-      exec_script("src/commit_id.py",
-                  [
-                    "unpack",
-                    _ref_file,
-                  ],
-                  "")
       inputs += [ ".git/" + _ref_file ]
     }
   }
@@ -1451,10 +1442,6 @@ if (is_android && symbol_level != 0) {
 if ((angle_standalone || build_with_chromium) && is_android &&
     current_toolchain == default_toolchain) {
   apk_version_code = "0"
-  if (angle_enable_commit_id) {
-    apk_version_code =
-        exec_script("src/commit_id.py", [ "position" ], "trim string")
-  }
 
   # Package ANGLE libraries for normal use on Android
   angle_apk("angle_chromium_apk") {
diff --git a/third_party/externals/angle2/build_overrides/build.gni b/third_party/externals/angle2/build_overrides/build.gni
index 83f0c895006512f3985df7fed31987417e3c8d97..b5697734fdc6f71a1f7ad1fdf6f822a837a182c9 100644
--- a/third_party/externals/angle2/build_overrides/build.gni
+++ b/third_party/externals/angle2/build_overrides/build.gni
@@ -13,21 +13,6 @@ declare_args() {
   gtest_enable_absl_printers = false
 }
 
-if (host_os == "mac" && use_system_xcode == "") {
-  _result = exec_script("${skia_root_dir}/build/mac/should_use_hermetic_xcode.py",
-                        [ target_os ],
-                        "value")
-
-  assert(_result != 2,
-         "Do not allow building targets with the default" +
-             "hermetic toolchain if the minimum OS version is not met.")
-  assert(_result != 3,
-         "iOS does not support building with a hermetic toolchain. " +
-             "Please install Xcode.")
-
-  use_system_xcode = _result != 1
-}
-
 enable_java_templates = true
 
 # Build with fewer Android dependencies
diff --git a/third_party/externals/dawn/build_overrides/build.gni b/third_party/externals/dawn/build_overrides/build.gni
index 49efb4ac2c980fdeedfe2abe908d9c052d8dca8a..687b781706374197b585b54a4c388eb88635958b 100644
--- a/third_party/externals/dawn/build_overrides/build.gni
+++ b/third_party/externals/dawn/build_overrides/build.gni
@@ -27,17 +27,3 @@ declare_args() {
 
 # Detect whether we can use the hermetic XCode like in Chromium and do so if
 # possible.
-if (host_os == "mac" && use_system_xcode == "") {
-  _result = exec_script("${skia_root_dir}/build/mac/should_use_hermetic_xcode.py",
-                        [ target_os ],
-                        "value")
-
-  assert(_result != 2,
-         "Do not allow building targets with the default" +
-             "hermetic toolchain if the minimum OS version is not met.")
-  assert(_result != 3,
-         "iOS does not support building with a hermetic toolchain. " +
-             "Please install Xcode.")
-
-  use_system_xcode = _result != 1
-}
diff --git a/third_party/externals/spirv-tools/build_overrides/build.gni b/third_party/externals/spirv-tools/build_overrides/build.gni
index ef92bbc01e3b36c7e2ab3606bcdaad0828c10fbd..0be8a7fb552e18f448c563954bab95e38e2dcf55 100644
--- a/third_party/externals/spirv-tools/build_overrides/build.gni
+++ b/third_party/externals/spirv-tools/build_overrides/build.gni
@@ -29,15 +29,3 @@ declare_args() {
   # FORCE_MAC_TOOLCHAIN].
   use_system_xcode = ""
 }
-
-if (use_system_xcode == "") {
-  if (target_os == "mac") {
-    _result = exec_script("${skia_root_dir}/build/mac/should_use_hermetic_xcode.py",
-                          [ target_os ],
-                          "value")
-    use_system_xcode = _result == 0
-  }
-  if (target_os == "ios") {
-    use_system_xcode = true
-  }
-}
diff --git a/third_party/externals/swiftshader/third_party/SPIRV-Tools/build_overrides/build.gni b/third_party/externals/swiftshader/third_party/SPIRV-Tools/build_overrides/build.gni
index ef92bbc01e3b36c7e2ab3606bcdaad0828c10fbd..0be8a7fb552e18f448c563954bab95e38e2dcf55 100644
--- a/third_party/externals/swiftshader/third_party/SPIRV-Tools/build_overrides/build.gni
+++ b/third_party/externals/swiftshader/third_party/SPIRV-Tools/build_overrides/build.gni
@@ -29,15 +29,3 @@ declare_args() {
   # FORCE_MAC_TOOLCHAIN].
   use_system_xcode = ""
 }
-
-if (use_system_xcode == "") {
-  if (target_os == "mac") {
-    _result = exec_script("${skia_root_dir}/build/mac/should_use_hermetic_xcode.py",
-                          [ target_os ],
-                          "value")
-    use_system_xcode = _result == 0
-  }
-  if (target_os == "ios") {
-    use_system_xcode = true
-  }
-}