diff --git a/controllers/runner_controller.go b/controllers/runner_controller.go
index 39391575..e4b09a87 100644
--- a/controllers/runner_controller.go
+++ b/controllers/runner_controller.go
@@ -588,17 +588,6 @@ func (r *RunnerReconciler) processRunnerCreation(ctx context.Context, runner v1a
 	return ctrl.Result{}, nil
 }
 
-// unregisterRunner unregisters the runner from GitHub Actions by name.
-//
-// This function returns:
-// - (true, nil) when it has successfully unregistered the runner.
-// - (false, nil) when the runner has been already unregistered.
-// - (false, err) when it postponed unregistration due to the runner being busy, or it tried to unregister the runner but failed due to
-//   an error returned by GitHub API.
-func (r *RunnerReconciler) unregisterRunner(ctx context.Context, enterprise, org, repo, name string) (bool, error) {
-	return unregisterRunner(ctx, r.GitHubClient, enterprise, org, repo, name, nil)
-}
-
 func (r *RunnerReconciler) updateRegistrationToken(ctx context.Context, runner v1alpha1.Runner) (bool, error) {
 	if runner.IsRegisterable() {
 		return false, nil