refactor(menu): remove unused property, update comments

Changes to be committed:
modified:   src/auro-menu.js

src/auro-menu.js

@@ -1,5 +1,4 @@
 /* eslint-disable no-magic-numbers */
-/* eslint-disable no-plusplus */
 // Copyright (c) 2021 Alaska Airlines. All right reserved. Licensed under the Apache-2.0 license
 // See LICENSE in the project root for license information.
 
@@ -22,20 +21,14 @@ import "focus-visible/dist/focus-visible.min.js";
 class AuroMenu extends LitElement {
   constructor() {
     super();
-
-    this.options = null;
     this.value = undefined;
   }
 
-  static get properties() {
-    return {
+  // static get properties() {
+  //   return {
 
-      /**
-       * @private
-       */
-      options: { type: Array }
-    };
-  }
+  //   };
+  // }
 
   static get styles() {
     return [
@@ -51,7 +44,7 @@ class AuroMenu extends LitElement {
   }
 
   /**
-   * Custom event for click events.
+   * Manage click events.
    * Event fires, but attributes are not changed on elements with the disabled attribute.
    * @private
    * @param {Object} event - Event object from the browser.
@@ -75,20 +68,23 @@ class AuroMenu extends LitElement {
   }
 
   /**
-   * Manage ArrowDown, ArrowUp and Enter events.
+   * Manage ArrowDown, ArrowUp and Enter keyboard events.
    * @private
    * @param {Object} event - Event object from the browser.
    */
   handleKeyDown(event) {
     event.preventDefault();
 
+    // With each keyboard 'enter' event, reset attr settings on options.
     this.items.forEach((item) => {
       if (event.key === `Enter`) {
         item.removeAttribute('selected');
         item.removeAttribute('aria-selected');
       }
     });
 
+    // With ArrowDown/ArrowUp events, pass new value to selectNextItem()
+    // With Enter event, set value and apply attrs
     switch (event.key) {
       case "ArrowDown":
         event.target.tabIndex = -1;
@@ -140,6 +136,7 @@ class AuroMenu extends LitElement {
 
   /**
    * Custom event that returns the selected option's value.
+   * Use event to trigger the state of wrapping elements.
    * @private
    */
   selectedOption() {
@@ -165,7 +162,7 @@ class AuroMenu extends LitElement {
 
   /**
    * This function will iterate over the array of items in the slot find the selected
-   * option that is not disabled and apply tabindex=0 to set tab order.
+   * option that is not disabled and apply tabindex='0' to set tab order.
    * @private
    */
   initializeIndex() {