Bug 389025 - Remove /css command to prevent conflicts with server-side /cs

r=silver@warwickcompsoc.co.uk (James Ross)
ChatZilla Only (NPOTB).

extensions/irc/xul/content/commands.js

@@ -205,7 +205,6 @@ function initCommands()
          ["wii",               cmdWhoIsIdle,        CMD_NEED_SRV | CMD_CONSOLE],
 
          /* aliases */
-         ["css",              "motif",                             CMD_CONSOLE],
          ["exit",             "quit",                              CMD_CONSOLE],
          ["j",                "join",                              CMD_CONSOLE],
          ["pass",             "quote PASS",                        CMD_CONSOLE],