bridge_with_irc: Remove obsolete comment.
MODIFY
zulip/integrations/bridge_with_irc/irc-mirror.py
zulip/integrations/bridge_with_irc/irc-mirror.py
# EXPERIMENTAL
# IRC <=> Zulip mirroring bot
#
-# Setup: First, you need to install python-irc version 8.5.3
-# (https://github.com/jaraco/irc)
from __future__ import print_function
import argparse

bridge_with_irc: Remove obsolete comment.