[Feature flag]: Clean up feature flag security_policies_kev_filter
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Label this issue](https://contributors.gitlab.com/manage-issue?action=label&projectId=278964&issueIid=576859) </details> <!--IssueSummary end--> <!--Title suggestion: [Feature flag] Cleanup <feature-flag-name>--> ## Summary This issue is to cleanup the `<security_policies_kev_filter>` feature flag, after the feature flag has been enabled by default for an appropriate amount of time in production. <!--Short description of what the feature is about and link to relevant other issues. Ensure to note if the feature will be removed completely or will be productized--> ## Owners - Team: Security Policies - Most appropriate slack channel to reach out to: `#g_srm_security_policies` - Best individual to reach out to: @arfedoro @imam_h - PM: @alan ## Stakeholders <!--Are there any other stages or teams involved that need to be kept in the loop? - Name of a PM - The Support Team - The Delivery Team--> ## Expectations ### What might happen if this goes wrong? <!--Any MRs that need to be rolled back? Communication that needs to happen? What are some things you can think of that could go wrong - data loss or broken pages?--> ### Cleaning up the feature flag <!--The checklist here is to help stakeholders keep track of the feature flag status--> - [ ] Specify in the issue description if this feature will be removed completely or will be productized as part of the Feature Flag cleanup - [ ] Create a merge request to remove `<feature-flag-name>` feature flag. Ask for review and merge it. - [ ] Remove all references to the feature flag from the codebase. - [ ] Remove the YAML definitions for the feature from the repository. - [ ] Create [a changelog entry](https://docs.gitlab.com/ee/development/feature_flags/#changelog). - [ ] Ensure that the cleanup MR has been deployed to both production and canary. If the merge request was deployed before [the code cutoff](https://about.gitlab.com/handbook/engineering/releases/#self-managed-releases-1), the feature can be officially announced in a release blog post. - [ ] `/chatops run auto_deploy status <merge-commit-of-cleanup-mr>` - [ ] Close the feature issue to indicate the feature will be released in the current milestone. - [ ] If not already done, clean up the feature flag from all environments by running these chatops command in `#production` channel: `/chatops run feature delete <feature-flag-name> --dev --pre --staging --staging-ref --production` - [ ] Close this rollout issue. <!--Uncomment the appropriate type label /label ~"type::feature" ~"feature::addition" /label ~"type::maintenance" /label ~"type::bug"-->
issue