vm_method.c: remove redundant check
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
vm_method.c: remove redundant check
given in ruby level should be checked before calling this
function.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e