Shadow-ignore for tells

Commented out the line where ignored users are told "Player is ignoring
messages from you." Messages will still be blocked, but the ignored
player will not know.

This is a modern tweak to the ignore system following the upgrade that
allowed the ignore list to cross accounts. Players were sending tells to
new characters to determine if they were enemies by checking if they
were ignored. This solves that problem.

Also, shadow-ignoring / shadow-banning in this manner has proven very
effective on other games and social media sites.