Removed touchUnlocked property form HTML5AudioSoundManager class

Author: pavle-goloskokovic

src/sound/html5/HTML5AudioSoundManager.js

@@ -46,15 +46,6 @@ var HTML5AudioSoundManager = new Class({
          * @default []
          */
         this.onBlurPausedSounds = [];
-        /**
-         * Flag used for indicating when the audio has been unlocked,
-         * if there ever was a need for it.
-         *
-         * @private
-         * @type {boolean}
-         * @default false
-         */
-        this.touchUnlocked = false;
         /**
          * Property that actually holds the value of global mute
          * for HTML5 Audio sound manager implementation.