properly use the eslint disable comment here for the imports having a side effect, don't disable the rule for the whole file

Author: vincentfretin

src/lib/viewport.js

@@ -1,8 +1,8 @@
 /* global AFRAME THREE ga */
-/* eslint-disable no-unused-vars */
+/* eslint-disable-next-line no-unused-vars */
 import TransformControls from './TransformControls.js';
+/* eslint-disable-next-line no-unused-vars */
 import EditorControls from './EditorControls.js';
-/* eslint-disable no-unused-vars */
 
 import { initRaycaster } from './raycaster';