Author: Damyon Wiese
MDL-61041 assign: Remove assignment 2.2 upgrader
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3412b12c22e648866015538a78fdb36784b7d1e9
http://github.com/moodle/moodle/commit/3412b12c22e648866015538a78fdb36784b7d1e9
+ 3.6 en [assignmentneedsupgrade,mod_assignment]
- 3.6 en [viewassignmentupgradetool,mod_assignment]