luci-lib-nixio: drop "bit" compatibility class

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

libs/luci-lib-nixio/root/usr/lib/lua/bit.lua

@@ -1,15 +0,0 @@
---[[
-nixio - Linux I/O library for lua
-
-Copyright 2009 Steven Barth <steven@midlink.org>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-http://www.apache.org/licenses/LICENSE-2.0
-
-$Id$
-]]--
-
-return require "nixio".bit