def delete(name)
      begin
        github.api.delete_label!(repo, name)
      rescue Octokit::Error => e
        puts "Error message: \"#{name}\" label is not existing."
        puts e
      end
    end
def delete(name)
      begin
        github.api.delete_label!(repo, name)
      rescue Octokit::Error => e
        puts "Error message: \"#{name}\" label is not existing."
        puts e
      end
    end
Delete label from repository.
 @param   [String] name
          Delete label name.
 @return  [void]