parse.y: remove trace

	* parse.y (reg_named_capture_assign_iter): do not insert trace
	  instructions before local variable assinments.  putobject is
	  expected at first.  [ruby-core:79940] [Bug #13287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@57934 b2dd03c8-39d4-4d8f-98ff-823fe69b080e