diff --git a/src/View/ThemeResourceLoader.php b/src/View/ThemeResourceLoader.php
index 390f64e36..1f13bf60d 100644
--- a/src/View/ThemeResourceLoader.php
+++ b/src/View/ThemeResourceLoader.php
@@ -20,13 +20,6 @@ class ThemeResourceLoader implements Flushable
      */
     private static $instance;
 
-    /**
-     * Internal memory cache for large sets of repeated calls
-     *
-     * @var array
-     */
-    protected static $cacheData = [];
-
     /**
      * The base path of the application
      *