monitoring: Remove HostsController::deleteCommentAction()

Not used.

modules/monitoring/application/controllers/HostsController.php

@@ -168,18 +168,6 @@ class HostsController extends Controller
         $this->handleCommandForm($form);
     }
 
-    /**
-     * Delete a comment
-     */
-    public function deleteCommentAction()
-    {
-        $this->assertPermission('monitoring/command/comment/delete');
-
-        $form = new DeleteCommentCommandForm();
-        $form->setTitle($this->translate('Delete Host Comments'));
-        $this->handleCommandForm($form);
-    }
-
     /**
      * Acknowledge host problems
      */