[Feature flag] Cleanup license_scanning_sbom_scanner
<!-- Title suggestion: [Feature flag] Cleanup <feature-flag-name> --> ## Summary This issue is to cleanup the `license_scanning_sbom_scanner` feature flag, after the feature flag has been enabled by default for an appropriate amount of time in production. ## Links Feature flag rollout issue: https://gitlab.com/gitlab-org/gitlab/-/issues/385173 Main feature issue: https://gitlab.com/gitlab-org/gitlab/-/issues/384932+ Main doc issue: https://gitlab.com/gitlab-org/gitlab/-/issues/388439+ Release post: https://about.gitlab.com/releases/2023/02/22/gitlab-15-9-released/#new-license-compliance-scanner Release post MR: https://gitlab.com/gitlab-com/www-gitlab-com/-/merge_requests/119232 ## Owners - Team: ~"group::composition analysis" - Most appropriate slack channel to reach out to: `#g_secure-composition-analysis` - Best individual to reach out to: @brytannia - PM: @sam.white ## 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 --> - [x] Create a merge request to remove `<feature-flag-name>` feature flag. Ask for review and merge it. - [x] Remove all references to the feature flag from the codebase. - [x] Remove the YAML definitions for the feature from the repository. - [x] Create [a changelog entry](https://docs.gitlab.com/ee/development/feature_flags/#changelog). - [x] 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. - [x] `/chatops run auto_deploy status <merge-commit-of-cleanup-mr>` - [x] Close [the feature issue](ISSUE LINK) to indicate the feature will be released in the current milestone. - [x] If not already done, clean up the feature flag from all environments by running these chatops command in `#production` channel: - [x] `/chatops run feature delete <feature-flag-name> --dev` - [x] `/chatops run feature delete <feature-flag-name> --staging` - [x] `/chatops run feature delete <feature-flag-name>` - [x] Close this rollout issue.
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