compile.c (rb_iseq_build_from_ary): remove misc handling

iseq->local_size is calculated, too, along with stack_size and
param.size, meaning there is no need to blindly load values in
the misc hash passed to us.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48725 b2dd03c8-39d4-4d8f-98ff-823fe69b080e