fixes #5707, removes cruft from TaggableListener::preDelete
fixes #5707, removes cruft from TaggableListener::preDelete

git-svn-id: 14431f16c86e063b591b7186ad64c5043b5760e0@14956 ee427ae8-e902-0410-961c-c3ed070cd9f9

weaverryan/sfDoctrineActAsTaggablePlugin,weaverryan/sfDoctrineActAsTaggablePlugin