--- remove_method(name)

    name ǻꤷ󥹥󥹥᥽åɤ⥸塼뤫
    ޤ⤷ꤷ᥽åɤƤʤȤˤ㳰
    NameError ȯޤ

        class Foo
          def foo() end
          remove_method(:foo)
        end

    self ֤ޤ

    undef_method ⻲ȤƤ

