Revert "Rooms: Clarify error"
Revert "Rooms: Clarify error"

This reverts commit 528cd010174d530014e6f3d088a08f19b449ccc3.

svivian/Pokemon-Showdown,xfix/Pokemon-Showdown,xfix/Pokemon-Showdown,svivian/Pokemon-Showdown,xfix/Pokemon-Showdown,svivian/Pokemon-Showdown,xfix/Pokemon-Showdown,svivian/Pokemon-Showdown,svivian/Pokemon-Showdown,xfix/Pokemon-Showdown