Revert "Disallow selecting by uid."

This reverts commit 99185dd0.

product/ERP5Catalog/CatalogTool.py

@@ -1360,9 +1360,6 @@ class CatalogTool (UniqueObject, ZCatalog, CMFCoreCatalogTool, ActiveObject):
     security.declarePublic('searchAndActivate')
     def searchAndActivate(self, *args, **kw):
       """Restricted version of _searchAndActivate"""
-      if 'uid' in kw:
-        raise TypeError("'uid' cannot be used to select documents as it is "
-          "used internally")
       return self._searchAndActivate(restricted=True, *args, **kw)
 
     security.declareProtected(Permissions.ManagePortal, 'upgradeSchema')