--- /dev/null
+ALTER TABLE /*$wgDBprefix*/archive DROP COLUMN ar_content_model;
+ALTER TABLE /*$wgDBprefix*/archive DROP COLUMN ar_content_format;
+
+ALTER TABLE /*$wgDBprefix*/revision DROP COLUMN rev_content_model;
+ALTER TABLE /*$wgDBprefix*/revision DROP COLUMN rev_content_format;
+
+ALTER TABLE /*$wgDBprefix*/page DROP COLUMN page_content_model;