Remove 'wikilove_image_log' from UserMerge hooks, it no longer exists
Remove 'wikilove_image_log' from UserMerge hooks, it no longer exists

Follows up e8b4d84a1c5c1

Change-Id: Id8e7f8cf64e9cfc95747a38133fede7ad68c89eb

wikimedia/mediawiki-extensions-WikiLove,wikimedia/mediawiki-extensions-WikiLove