diff --git a/phpBB/includes/template/twig/environment.php b/phpBB/includes/template/twig/environment.php
index 73375444da..190d43f513 100644
--- a/phpBB/includes/template/twig/environment.php
+++ b/phpBB/includes/template/twig/environment.php
@@ -38,36 +38,6 @@ class phpbb_template_twig_environment extends Twig_Environment
 		return parent::__construct($loader, $options);
 	}
 
-	/**
-	* Gets the cache filename for a given template.
-	*
-	* @param string $name The template name
-	* @return string The cache file name
-	*/
-	public function ignoregetCacheFilename($name)
-	{
-		if (false === $this->cache)
-		{
-			return false;
-		}
-		// @todo
-		$file_path = $this->getLoader()->getCacheKey($name);
-		foreach ($this->getLoader()->getNamespaces() as $namespace)
-		{
-			foreach ($this->getLoader()->getPaths($namespace) as $path)
-			{
-				if (strpos($file_path, $path) === 0)
-				{
-					//return $this->getCache() . '/' . preg_replace('#[^a-zA-Z0-9_/]#', '_', $namespace . '/' . $name) . '.php';
-				}
-			}
-		}
-
-		// We probably should never get here under normal circumstances
-		return $this->getCache() . '/' . preg_replace('#[^a-zA-Z0-9_/]#', '_', $name) . '.php';
-		return $this->getCache() . '/' . preg_replace('#[^a-zA-Z0-9_/]#', '_', $name) . '_' . md5($this->getLoader()->getCacheKey($name)) . '.php';
-	}
-
 	/**
 	* Get the list of enabled phpBB extensions
 	*