hash.c: rb_hash_delete does not call the block

* hash.c (rb_hash_delete): now does not call the block given to
  the current method.  [ruby-core:65861] [Bug #10413]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48114 b2dd03c8-39d4-4d8f-98ff-823fe69b080e