Remove assertion which depends the load order

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33209 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/psych/helper.rb

@@ -2,6 +2,7 @@ require 'minitest/autorun'
 require 'stringio'
 require 'tempfile'
 require 'date'
+require 'psych'
 
 module Psych
   class TestCase < MiniTest::Unit::TestCase
@@ -53,11 +54,3 @@ module Psych
     end
   end
 end
-
-require 'psych'
-
-# FIXME: remove this when syck is removed
-o = Object.new
-a = o.method(:psych_to_yaml)
-b = o.method(:to_yaml)
-raise "psych should define to_yaml" unless a == b