Revert "Issue #1089040 by Remon, mlncn: Added Cache rdf_get_namespaces() using...

Revert "Issue #1089040 by Remon, mlncn: Added Cache rdf_get_namespaces() using drupal_static(). Don't add caches unless there's a demonstrated performance degradation."

This reverts commit 8d153441.

core/modules/rdf/rdf.module

@@ -95,18 +95,16 @@ function rdf_rdf_namespaces() {
  * hook_rdf_namespaces().
  */
 function rdf_get_namespaces() {
-  $rdf_namespaces = &drupal_static(__FUNCTION__);
-  if (!isset($rdf_namespaces)) {
   $rdf_namespaces = module_invoke_all('rdf_namespaces');
-    // module_invoke_all() uses array_merge_recursive() which might return
-    // nested arrays if several modules redefine the same prefix multiple
-    // times. We need to ensure the array of namespaces is flat and only
-    // contains strings as URIs.
+  // module_invoke_all() uses array_merge_recursive() which might return nested
+  // arrays if several modules redefine the same prefix multiple times. We need
+  // to ensure the array of namespaces is flat and only contains strings as
+  // URIs.
   foreach ($rdf_namespaces as $prefix => $uri) {
     if (is_array($uri)) {
       if (count(array_unique($uri)) == 1) {
-          // All namespaces declared for this prefix are the same, merge them
-          // all into a single namespace.
+        // All namespaces declared for this prefix are the same, merge them all
+        // into a single namespace.
         $rdf_namespaces[$prefix] = $uri[0];
       }
       else {
@@ -117,7 +115,6 @@ function rdf_get_namespaces() {
       }
     }
   }
-  }
   return $rdf_namespaces;
 }