AS tests are now order_independent!

activesupport/test/abstract_unit.rb

@@ -38,8 +38,3 @@ def jruby_skip(message = '')
 end
 
 require 'mocha/setup' # FIXME: stop using mocha
-
-# FIXME: we have tests that depend on run order, we should fix that and
-# remove this method call.
-require 'active_support/test_case'
-ActiveSupport::TestCase.my_tests_are_order_dependent!