code: def delete(self, url, callback, json=None):
          
          return self.adapter.delete(url, callback, json=json)
docs: Delete a URL.
  
          Args:
  
              url(string): URL for the request
  
              callback(func): The response callback function
  
          Keyword Args:
  
              json(dict): JSON body for the request
  
          Returns:
  
              The result of the callback handling the resopnse from the
                  executed request