Delete inactive user cause error log

[tomaszkane]

Case:

1. register user (without activation/confirm)
2. delete user account
3. got error log:
   [error][bizley\podium\models\Activity::deleteUser] [ 'msg' => 'Cannot delete user activity', 'model' => xx, ]
   by: Activity:102

Why If user activity is empty make error log?

BTW, Podium version 0.7

[bizley]

Not a bug per se but it should be logged only when activity can not be deleted - not when it's empty.

This is done to update information about current forum visitors.