code: def remove_note(self, username, index):
          
          self.cached_json['users'][username]['ns'].pop(index)
  
          # Go ahead and remove the user's entry if they have no more notes left
          if len(self.cached_json['users'][username]['ns']) == 0:
              del self.cached_json['users'][username]
  
          return '"delete note #{} on user {}" via puni'.format(index, username)
docs: Remove a single usernote from the usernotes.
  
          Arguments:
              username: the user that for whom you're removing a note (str)
              index: the index of the note which is to be removed (int)
  
          Returns the update message for the usernotes wiki