<!--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> - [Work on this issue](https://contributors.gitlab.com/manage-issue?action=work&projectId=278964&issueIid=361598) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=361598) </details> <!--IssueSummary end--> ## About After https://gitlab.com/gitlab-org/gitlab/-/issues/361392 can remove the `slack_app_verification_token` setting from `ApplicationSettings`. The setting was only used by SaaS.