code: public Observable<Void> deleteTagAsync(UUID projectId, UUID tagId) {
          return deleteTagWithServiceResponseAsync(projectId, tagId).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: Delete a tag from the project.
  
  @param projectId The project id
  @param tagId Id of the tag to be deleted
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponse} object if successful.