Remove unused `element` argument from CrossFrame constructor

src/annotator/cross-frame.js

@@ -13,18 +13,13 @@ import { AnnotationSync } from './annotation-sync';
  *
  * It can be used to publish events to and subscribe to events from the sidebar.
  *
- * This class also has logic for injecting Hypothesis into iframes that
- * are added to the page if they have the `enable-annotation` attribute set
- * and are same-origin with the current document.
- *
  * @implements Destroyable
  */
 export class CrossFrame {
   /**
-   * @param {Element} element
    * @param {EventBus} eventBus - Event bus for communicating with the annotator code (eg. the Guest)
    */
-  constructor(element, eventBus) {
+  constructor(eventBus) {
     this._bridge = new Bridge();
     this._annotationSync = new AnnotationSync(eventBus, this._bridge);
   }

src/annotator/guest.js

@@ -163,7 +163,7 @@ export default class Guest {
     this._frameIdentifier = config.subFrameIdentifier || null;
 
     // Setup connection to sidebar.
-    this.crossframe = new CrossFrame(this.element, eventBus);
+    this.crossframe = new CrossFrame(eventBus);
     this.crossframe.onConnect(() => this._setupInitialState(config));
 
     this._hypothesisInjector = new HypothesisInjector(this.element, config);

src/annotator/test/cross-frame-test.js

@@ -10,8 +10,7 @@ describe('CrossFrame', () => {
 
   const createCrossFrame = (options = {}) => {
     fakeEventBus = {};
-    const element = document.createElement('div');
-    return new CrossFrame(element, fakeEventBus, options);
+    return new CrossFrame(fakeEventBus, options);
   };
 
   beforeEach(() => {

src/annotator/test/guest-test.js

@@ -142,7 +142,7 @@ describe('Guest', () => {
   describe('cross frame', () => {
     it('provides an event bus for the annotation sync module', () => {
       createGuest();
-      assert.deepEqual(CrossFrame.lastCall.args[1], eventBus);
+      assert.deepEqual(CrossFrame.lastCall.args[0], eventBus);
     });
 
     it('publishes the "panelReady" event when a connection is established', () => {