diff -r 058bb3dc685f -r 0b59724cb3f2 misc/migration/3.11.0_Any.py
--- a/misc/migration/3.11.0_Any.py	Mon Jan 04 18:40:30 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,11 +0,0 @@
-from datetime import datetime
-
-for rtype in ('cw_support', 'cw_dont_cross', 'cw_may_cross'):
-    drop_relation_type(rtype)
-
-add_entity_type('CWSourceSchemaConfig')
-
-if not 'url' in schema['CWSource'].subjrels:
-    add_attribute('CWSource', 'url')
-    add_attribute('CWSource', 'parser')
-    add_attribute('CWSource', 'latest_retrieval')