How to delete private deploy keys | Gitlab

I need to delete a private deploy key added to my repository but i can’t find that option of gitlab GUI

All controls for the deploy tokens, including the revoke button, should be available under the project’s settings: Deploy Tokens | GitLab (quoting a part below):

  1. Go to the project (or group) you want to revoke Deploy Tokens for.
  2. Go to Settings > Repository .
  3. Click on “Expand” on Deploy Tokens section.
  4. Click the Revoke button under the ‘Active deploy tokens’ area against the token that must not be permitted anymore.