Remove use of goog.array.sort

Fixes #4160

src/ol/render/canvas/canvasreplay.js

@@ -1979,7 +1979,7 @@ ol.render.canvas.ReplayGroup.prototype.replay = function(
 
   /** @type {Array.<number>} */
   var zs = Object.keys(this.replaysByZIndex_).map(Number);
-  goog.array.sort(zs);
+  zs.sort();
 
   // setup clipping so that the parts of over-simplified geometries are not
   // visible outside the current extent when panning
@@ -2035,7 +2035,7 @@ ol.render.canvas.ReplayGroup.prototype.replayHitDetection_ = function(
     featureCallback, opt_hitExtent) {
   /** @type {Array.<number>} */
   var zs = Object.keys(this.replaysByZIndex_).map(Number);
-  goog.array.sort(zs, function(a, b) { return b - a; });
+  zs.sort(function(a, b) { return b - a; });
 
   var i, ii, j, replays, replay, result;
   for (i = 0, ii = zs.length; i < ii; ++i) {