Remove TODO for passing state

It looks like the page and simultaneousPages can be undefined, so better to avoid overwrite data with undefined

Resources/Public/JavaScript/PageView/Controller.js

@@ -124,7 +124,6 @@ class dlfController {
      * @param {dlf.StateChangeDetail} detail
      */
     changeState(detail) {
-        // TODO(client-side): Consider passing full new state in stateChanged event, then reduce usage of currentPageNo and simultaneousPages properties
         if (detail.page !== undefined) {
             this.doc.state.page = detail.page;
         }