Remove extra blank line

Remove extra blank line

diff --git a/spec/models/topic_thumbnail_spec.rb b/spec/models/topic_thumbnail_spec.rb
index ab7ff72..08b1e61 100644
--- a/spec/models/topic_thumbnail_spec.rb
+++ b/spec/models/topic_thumbnail_spec.rb
@@ -7,7 +7,6 @@ describe "TopicThumbnail" do
   let(:upload2) { Fabricate(:image_upload, width: 5000, height: 5000) }
   let(:topic2) { Fabricate(:topic, image_upload: upload2) }
 
-
   before do
     SiteSetting.create_thumbnails = true
     topic.generate_thumbnails!(extra_sizes: nil)

GitHub sha: cf16173e