Lint free.

src/ol/renderer/dom/tilelayer.js

@@ -102,6 +102,7 @@ ol.renderer.dom.TileLayer.prototype.removeAltZTiles_ = function() {
   }
 };
 
+
 /**
  * Get rid of tiles outside the rendered extent.  Only removes tiles at the
  * currently rendered z.
@@ -127,6 +128,7 @@ ol.renderer.dom.TileLayer.prototype.removeOutOfRangeTiles_ = function() {
   }
 };
 
+
 /**
  * @param {goog.events.Event} event Tile change event.
  * @private