Removes the warning from the log when SoundSystem shuts down as its commonly the final log.
Prevents this
[Client thread/WARN] [net.minecraft.client.audio.SoundManager]: Author: Paul Lamb, www.paulscode.com
from being sent using ASM. It does this by visiting SoundSystem.java and replacing its importantMessage method with a dummy that does nothing. Will not affect wider error logging as it doesn't modify the SoundSystemLogger class proper
It's annoying. Paul, you made an excellent sound system, but you don't need to tell me when I shut down the game
