remove html_types set

Now that `all` has it's own object, we don't need the html_types Set.

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/test/dispatch/mime_type_test.rb b/actionpack/test/dispatch/mime_type_test.rb
index 791c6ff625..d9fb44f06d 100644
--- a/actionpack/test/dispatch/mime_type_test.rb
+++ b/actionpack/test/dispatch/mime_type_test.rb
@@ -165,7 +165,7 @@ class MimeTypeTest < ActiveSupport::TestCase
       assert mime.respond_to?("#{type}?"), "#{mime.inspect} does not respond to #{type}?"
       assert_equal type, mime.symbol, "#{mime.inspect} is not #{type}?"
       invalid_types = types - [type]
-      invalid_types.delete(:html) if Mime::Type.html_types.include?(type)
+      invalid_types.delete(:html)
       invalid_types.each { |other_type|
         assert_not_equal mime.symbol, other_type, "#{mime.inspect} is #{other_type}?"
       }