ERP5Type.Base: Remove setDescription.

Documents should inherit from XMLObject, which already overloads this
setter. As a result, this method is normally not used.
The problem is that it gets called when calling
  newTempBase(
    description='foo'
  )
which fails with:
  AttributeError: _setDescription
because _setProperty finds setDescription and tries to call it, instead
of setting description as a local property..

product/ERP5Type/Base.py

@@ -759,16 +759,6 @@ class Base( CopyContainer,
     self._setTitle(value)
     self.reindexObject()
 
-  security.declareProtected( Permissions.ModifyPortalContent, 'setDescription' )
-  def setDescription(self, value):
-    """
-      Set the description and reindex.
-      Overrides CMFCore/PortalFolder.py implementation, which does not reindex
-      and is guarded by inappropriate security check.
-    """
-    self._setDescription(value)
-    self.reindexObject()
-
   security.declarePublic('provides')
   def provides(cls, interface_name):
     """