irc_mirror_backend: Remove repeated dictionary key.
MODIFY
zulip/integrations/bridge_with_irc/irc_mirror_backend.py
zulip/integrations/bridge_with_irc/irc_mirror_backend.py
@@ -106,7 +106,6 @@ class IRCBot(irc.bot.SingleServerIRCBot):
"type": "stream",
"to": self.stream,
"subject": self.topic,
- "content": content,
"content": "**{}**: {}".format(sender, content),
}))

irc_mirror_backend: Remove repeated dictionary key.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>