Remove useless `only_path: true` in path helpers

We added a deprecation warning for these cases in aa1fadd4, so these are now
causing deprecation warnings in the test output. AFAICT, in these two cases, the
option is not integral to the purpose of the test, so they can be safely removed

actionpack/test/controller/url_for_test.rb

@@ -25,8 +25,7 @@ def test_nested_optional
 
         path = klass.new.fun_path({:controller => :articles,
                                    :baz        => "baz",
-                                   :zot        => "zot",
-                                   :only_path  => true })
+                                   :zot        => "zot"})
         # :bar key isn't provided
         assert_equal '/foo/zot', path
       end
@@ -291,7 +290,7 @@ def test_only_path
           assert_equal '/brave/new/world',
             controller.url_for(:controller => 'brave', :action => 'new', :id => 'world', :only_path => true)
 
-          assert_equal("/home/sweet/home/alabama", controller.home_path(:user => 'alabama', :host => 'unused', :only_path => true))
+          assert_equal("/home/sweet/home/alabama", controller.home_path(:user => 'alabama', :host => 'unused'))
           assert_equal("/home/sweet/home/alabama", controller.home_path('alabama'))
         end
       end