What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug

What does this PR do / why do we need it:

• currently, both config and configurationManager are showed in api document, and config shows in bad format
• modify config api, and delete class ConfigurationManager, and put the function that inner origin ConfigurationManager class outside

Which issue(s) this PR fixes:

Fixes #I1N0OG:dataset: Instantiated object config in api document shows in bad format

Special notes for your reviewers: