- remove square/thumb from choices on picture

- fix content margin on password register 
- purge derivative cache by type of derivative
- session saved infos/messages are not given to the page on html redirections
- shorter/faster code in functions_xxx

git-svn-id: http://piwigo.org/svn/trunk@13074 68402e56-0260-453c-a942-63ccdbb3a9ee

include/functions_category.inc.php

@@ -485,33 +485,5 @@ SELECT image_id
   return $image_id;
 }
 
-/**
- * create a tree from a flat list of categories, no recursivity for high speed
- */
-function categories_flatlist_to_tree($categories)
-{
-  $tree = array();
-  $key_of_cat = array();
 
-  foreach ($categories as $key => &$node)
-  {
-    $key_of_cat[$node['id']] = $key;
-
-    if (!isset($node['id_uppercat']))
-    {
-      $tree[$key] = &$node;
-    }
-    else
-    {
-      if (!isset($categories[ $key_of_cat[ $node['id_uppercat'] ] ]['sub_categories']))
-      {
-        $categories[ $key_of_cat[ $node['id_uppercat'] ] ]['sub_categories'] = array();
-      }
-
-      $categories[ $key_of_cat[ $node['id_uppercat'] ] ]['sub_categories'][$key] = &$node;
-    }
-  }
-
-  return $tree;
-}
 ?>