Clean up MCM RBAC resources migration logic

Author: georgibaltiev

cmd/gardener-extension-provider-aws/app/app.go

@@ -269,16 +269,6 @@ func NewControllerManagerCommand(ctx context.Context) *cobra.Command {
 				return fmt.Errorf("could not add ready check for webhook server to manager: %w", err)
 			}
 
-			// TODO (georgibaltiev): Remove after the release of version 1.64.0
-			if reconcileOpts.ExtensionClass != "garden" {
-				log.Info("Adding migration runnables")
-				if err := mgr.Add(manager.RunnableFunc(func(ctx context.Context) error {
-					return purgeMachineControllerManagerRBACResources(ctx, mgr.GetClient(), log)
-				})); err != nil {
-					return fmt.Errorf("error adding migrations: %w", err)
-				}
-			}
-
 			if err := mgr.Start(ctx); err != nil {
 				return fmt.Errorf("error running manager: %w", err)
 			}