Clean up duplicate encoding

http2irc.py

@@ -430,7 +430,7 @@ class IRCClientProtocol(asyncio.Protocol):
 			else:
 				self.logger.info(f'Sending {message!r} to {channel!r}')
 				self.unconfirmedMessages.append((channel, message))
-				self.send(b'PRIVMSG ' + channel.encode('utf-8') + b' :' + message.encode('utf-8'))
+				self.send(b'PRIVMSG ' + channelB + b' :' + messageB)
 				await asyncio.sleep(1) # Rate limit
 
 	async def confirm_messages(self):