Fix #4377: Save commentary by default.

Remove the "Include artist commentary" checkbox. Commentary is included
by default unless the commentary fields are blank.

test/unit/upload_service_test.rb

@@ -1210,10 +1210,9 @@ class UploadServiceTest < ActiveSupport::TestCase
         @upload = FactoryBot.create(:source_upload, file_size: 1000, md5: "12345", file_ext: "jpg", image_width: 100, image_height: 100)
       end
 
-      should "create a commentary record" do
-        assert_difference(-> { ArtistCommentary.count }) do
+      should "create a commentary record if the commentary is present" do
+        assert_difference("ArtistCommentary.count", 1) do
           @upload.update!(
-            include_artist_commentary: true,
             artist_commentary_title: "blah",
             artist_commentary_desc: "blah",
             translated_commentary_title: "blah",
@@ -1223,6 +1222,18 @@ class UploadServiceTest < ActiveSupport::TestCase
         end
       end
 
+      should "not create a commentary record if the commentary is blank" do
+        assert_difference("ArtistCommentary.count", 0) do
+          @upload.update!(
+            artist_commentary_title: "",
+            artist_commentary_desc: "",
+            translated_commentary_title: "",
+            translated_commentary_desc: ""
+          )
+          UploadService.new({}).create_post_from_upload(@upload)
+        end
+      end
+
       should "create a post" do
         post = subject.new({}).create_post_from_upload(@upload)
         assert_equal([], post.errors.full_messages)