Remove dead code

src/async.js

@@ -132,12 +132,6 @@ if (!util.hasDevTools) {
     };
 }
 
-Async.prototype.invokeFirst = function (fn, receiver, arg) {
-    ASSERT(arguments.length === 3);
-    this._normalQueue.unshift(fn, receiver, arg);
-    this._queueTick();
-};
-
 Async.prototype._drainQueue = function(queue) {
     while (queue.length() > 0) {
         var fn = queue.shift();

src/queue.js

@@ -25,23 +25,6 @@ Queue.prototype._pushOne = function (arg) {
     this._length = length + 1;
 };
 
-Queue.prototype._unshiftOne = function(value) {
-    var capacity = this._capacity;
-    this._checkCapacity(this.length() + 1);
-    var front = this._front;
-    var i = (((( front - 1 ) &
-                    ( capacity - 1) ) ^ capacity ) - capacity );
-    this[i] = value;
-    this._front = i;
-    this._length = this.length() + 1;
-};
-
-Queue.prototype.unshift = function(fn, receiver, arg) {
-    this._unshiftOne(arg);
-    this._unshiftOne(receiver);
-    this._unshiftOne(fn);
-};
-
 Queue.prototype.push = function (fn, receiver, arg) {
     ASSERT(arguments.length === 3);
     ASSERT(typeof fn === "function");