Fix legacy constructors

These go way back to php 4 and don't need to be like this for any
reason. Currently error handling is acting up when these throw an
error.

airtime_mvc/application/cloud_storage/FileStorageBackend.php

@@ -2,11 +2,6 @@
 
 class FileStorageBackend extends StorageBackend
 {
-    //Stub class
-    public function FileStorageBackend()
-    {
-    }
-
     public function getAbsoluteFilePath($resourceId)
     {
         //TODO
@@ -32,4 +27,4 @@ class FileStorageBackend extends StorageBackend
     {
         return "";
     }
-}
+}