Author: Anupama Sarjoshi
MDL-78019 core: Logs to record user file deleted from draft area
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b4b9248b7888e30c7245acebd79df206b8f166ff
http://github.com/moodle/moodle/commit/b4b9248b7888e30c7245acebd79df206b8f166ff
+ 4.3 en [eventfiledeletedfromdraftarea,core_files]