Go to phpmyadmin and run this sql
SET @iHandlerId:= (SELECT `id` FROM `sys_alerts_handlers` WHERE `name`='bx_spy_content_activity' LIMIT 1);
DELETE FROM `sys_alerts_handlers` WHERE `id` = @iHandlerId;
DELETE FROM `sys_alerts` WHERE `handler_id`= @iHandlerId;
It will remove the content update from spy and if you want to remove profile activity like profile edit, profile rate etc
run this
SET @iHandlerId:= (SELECT `id` FROM `sys_alerts_handlers` WHERE `name`='bx_spy_profiles_activity' LIMIT 1);
SELECT * FROM `sys_alerts` WHERE `handler_id`= @iHandlerId;
and delete what you want to.
Enjoy :)
so much to do....