[multi-sources-removal] drop source location search on glob_*[entity|relation] methods
source is now always the system source
Related to #2919300
[jcr: fix wrong rebase in symmetric relation removal]
# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s specific hooks and operations"""