title: TypeError: 'bool' object is not iterable
body: <p>Hi I'm having some issues with a bit of code which I'm getting a type error 
  which is <code>TypeError: 'bool' object is not iterable</code> Should I be using an <code>if</code> state rather that a <code>for</code> statement? </p>
  
  <p>What I'm trying to achieve is if <code>on_message</code> a message has been pinned for 7 days or more then unpin that message. </p>
  
  <p>Here's what I'm working with:</p>
  
  <pre><code>async def on_message(self, message):
      """Listen for a message then unpin any other messages older than 7 days"""
      server = message.server
      channelid = '490899209067823135'
      limit_date = datetime.now() - timedelta(days=7)
      if server:
          for message.content in message.channel.id == channelid:
              if limit_date:
                  try:
                      await self.bot.unpin_message(message)
  
                  except discord.Forbidden:
                      print("No permissions to do that!")
  </code></pre>
  
  <p>Not sure where I'm going wrong here.</p>