How to delete pipelines from GitLab Community Edition 11.2.3 06cbee3

How to delete old pipelines

Describe:

  • Due to test the custom of ci, make a lot of old pipelines record, i hope that those can be delete
  • According to docs, Delete a pipeline(Pipelines API | GitLab), i see that this api can be used is after GitLab 11.6, but the version i used is 11.2.3
  • How can i delete old pipelines?

This is make me confuse!!!