Remove unused data from discussions endpoint

We don't need a series of attributes to render diff files on
discussions.json request. Therefore this MR removes lots of unnecessary
attributes from the request, mainly the highlighted diff lines, which
are pretty expensive.

1 files changed, 0 insertions, 8 deletions

diff --git a/spec/serializers/discussion_entity_spec.rb b/spec/serializers/discussion_entity_spec.rb
index 0590304e832..138749b0fdf 100644
--- a/spec/serializers/discussion_entity_spec.rb
+++ b/spec/serializers/discussion_entity_spec.rb
@@ -74,13 +74,5 @@ describe DiscussionEntity do
         :active
       )
     end
-
-    context 'when diff file is a image' do
-      it 'exposes image attributes' do
-        allow(discussion).to receive(:on_image?).and_return(true)
-
-        expect(subject.keys).to include(:image_diff_html)
-      end
-    end
   end
 end