fix:Remove the Activity option in the operation drop-down list of the pipeline list page

Created by: 123liubao

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #2533 (closed)

Special notes for reviewers:

Does this PR introduced a user-facing change?

None

Additional documentation, usage docs, etc.: