dedupe linter.enableForEditor calls

edit/edit.js

@@ -89,6 +89,7 @@ lazyInit();
   dirty.onChange(updateDirty);
   await editor.ready;
 
+  setTimeout(() => editor.getEditors().forEach(linter.enableForEditor));
   // enabling after init to prevent flash of validation failure on an empty name
   $('#name').required = !editor.isUsercss;
   $('#save-button').onclick = editor.save;

edit/sections-editor.js

@@ -517,7 +517,6 @@ function SectionsEditor() {
       if (!originalSections.length) {
         setGlobalProgress();
         requestAnimationFrame(fitToAvailableSpace);
-        sections.forEach(({cm}) => setTimeout(linter.enableForEditor, 0, cm));
         done();
       } else {
         setTimeout(chunk);

edit/source-editor.js

@@ -90,7 +90,6 @@ function SourceEditor() {
     linter.run();
     updateLinterSwitch();
   });
-  debounce(linter.enableForEditor, 0, cm);
   if (!$.isTextInput(document.activeElement)) {
     cm.focus();
   }