Fix some mostakes that happened during the 5.0 release

Author: carakas

UPGRADE_5.0.md

@@ -206,7 +206,7 @@ SPOON_CHARSET is removed. From now on you need to get the charset by using the k
 
 ## PATH_WWW
 
-PATH_WWW is removed. From now on you need to get the path to the web directory by using the site.path_www parameter, f.e.
+PATH_WWW is deprecated. From now on you need to get the path to the web directory by using the site.path_www parameter, f.e.
 Twig has trouble with traversing directories, so in that or similar cases you can wrap it with the `realpath` function.
 
     $this->getContainer()->getParameter('site.path_www')

src/Frontend/Core/Engine/Base/Config.php

@@ -84,11 +84,6 @@ public function getPossibleActions(): array
         return $this->possibleActions;
     }
 
-    public function getPossibleAJAXActions(): array
-    {
-        return $this->possibleAJAXActions;
-    }
-
     /**
      * Set the possible actions, based on files in folder.
      * You can disable action in the config file. (Populate $disabledActions)