docs: def del_design(self, design_name):
      """
      Removes the specified design
  
      design_name <str>
      """
  
      try:
  
        design = self.get_design(design_name)
        r = requests.request(
          "DELETE",
          "%s/%s/_design/%s" % (
            self.host,
            self.database_name,
            design_name
          ),
          params={"rev" : design.get("_rev")},
          auth=self.auth
        )
        return self.result(r.text)
  
      except:
        raise