* hash.c (rb_hash_keys): make rb_hash_keys() static.
  it is no longer used from array.c since r43969.
  the patch is from normalperson (Eric Wong).
  [ruby-core:59449] [Feature #9336]

* internal.h: remove definition of rb_hash_keys().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44478 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-01-02

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e