title: discord.js remove a user from channel permissions
body: <p>I was wondering if anyone out there knows if there is a way to remove a user from the list of allowed users/roles in textchannel permissions.  I know that I can simply deny a READ_MESSAGES permission for that user in the channel to make the room invisible to them.  Is there a way to have my bot remove the allowed user from the permission list all-together?</p>
  
  <p>Thank you.</p>