def delete!(force = false)
      if local?
        @lib.branch(@name, :force => force, :delete => true)
      else
        @lib.push(Process.server_name, nil, nil, :delete => @name)
      end
    end
def delete!(force = false)
      if local?
        @lib.branch(@name, :force => force, :delete => true)
      else
        @lib.push(Process.server_name, nil, nil, :delete => @name)
      end
    end
Delete this branch

 @param [Boolean] force should this force removal even if the branch has not been fully merged?

 @return [String] the output of running the git command