code: protected function removeOldFeeds($blnReturn=false)
  	{
  		@trigger_error('Using Controller::removeOldFeeds() has been deprecated and will no longer work in Contao 5.0. Use Automator::purgeXmlFiles() instead.', E_USER_DEPRECATED);
  
  		$this->import(Automator::class, 'Automator');
  		$this->Automator->purgeXmlFiles($blnReturn);
  	}
docs: Remove old XML files from the share directory
  
  @param boolean $blnReturn If true, only return the finds and don't delete
  
  @deprecated Deprecated since Contao 4.0, to be removed in Contao 5.0.
  Use Automator::purgeXmlFiles() instead.