Remove last traces of has-emoji class (#11263)

Now that emojify.js has been removed, get rid of all instances of has-emoji class that was only used for that. Support for rendering shortcodes should remain in all of these places so it should still work the same.

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lauris BH <lauris@nix.lv>

modules/markup/html.go

@@ -284,6 +284,8 @@ func RenderDescriptionHTML(
 		urlPrefix: urlPrefix,
 		procs: []processor{
 			descriptionLinkProcessor,
+			emojiShortCodeProcessor,
+			emojiProcessor,
 		},
 	}
 	return ctx.postProcess(rawHTML)