vm_method.c: get rid of cache

* vm_method.c (rb_method_entry_make): get rid of storing method
  cache, so that the added method will be called later.
  [ruby-dev:48691] [Bug #10421]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48118 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-10-24

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48119 b2dd03c8-39d4-4d8f-98ff-823fe69b080e