code: public void deleteSystemHook(SystemHook hook) throws GitLabApiException {
  
          if (hook == null) {
              throw new RuntimeException("hook cannot be null");
          }
  
          deleteSystemHook(hook.getId());
      }
docs: Deletes a system hook. This method requires admin access.
  
  <pre><code>GitLab Endpoint: DELETE /hooks/:hook_id</code></pre>
  
  @param hook the SystemHook instance to delete
  @throws GitLabApiException if any exception occurs