code: def delete_version(self, project, version):
          
          url = self._build_url(constants.DELETE_VERSION_ENDPOINT)
          data = {
              'project': project,
              'version': version
          }
          self.client.post(url, data=data, timeout=self.timeout)
          return True
docs: Deletes a specific version of a project. First class, maps to
          Scrapyd's delete version endpoint.