Author: Frederic Massart
MDL-53654 competency: Provide a way to delete evidence
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1e99f31e33d7ce518d135b87e5cf6b943d1538cc
http://github.com/moodle/moodle/commit/1e99f31e33d7ce518d135b87e5cf6b943d1538cc
+ 3.1 en [competency:evidencedelete,core_role]