Remove unused editor.css and editor.js imports.

src/templates/src/editor.html

@@ -1,10 +1,6 @@
 {{ template "base.html" . }}
 
 {{ define "extrahead" }}
-    {{/* TODO: These are no longer useful? */}}
-    <link rel="stylesheet" href="{{ static "editor.css" }}" />
-    <script src="{{ static "editor.js" }}"></script>
-
     <script src="{{ static "go_wasm_exec.js" }}"></script>
     <script>
         const previewWorker = new Worker('/assets/editorpreviews.js');