Drop implementation specific routing test assertions

actionpack/test/controller/routing_test.rb

@@ -984,9 +984,6 @@ def test_draw_default_route
       end
 
       assert_equal 1, set.routes.size
-      route = set.routes.first
-
-      assert route.segments.last.optional?
 
       assert_equal '/users/show/10', set.generate(:controller => 'users', :action => 'show', :id => 10)
       assert_equal '/users/index/10', set.generate(:controller => 'users', :id => 10)