code: def delete_requests_request_id(self, request_id, synchronous=None):
          
          route_values = {}
          if request_id is not None:
              route_values['requestId'] = self._serialize.url('request_id', request_id, 'str')
          query_parameters = {}
          if synchronous is not None:
              query_parameters['synchronous'] = self._serialize.query('synchronous', synchronous, 'bool')
          self._send(http_method='DELETE',
                     location_id='ebc09fe3-1b20-4667-abc5-f2b60fe8de52',
                     version='5.0-preview.1',
                     route_values=route_values,
                     query_parameters=query_parameters)
docs: DeleteRequestsRequestId.
          [Preview API] Delete a symbol request by request identifier.
          :param str request_id: The symbol request identifier.
          :param bool synchronous: If true, delete all the debug entries under this request synchronously in the current session. If false, the deletion will be postponed to a later point and be executed automatically by the system.