Remove remaining use of inherits in src

src/ol/layer/Tile.js

@@ -31,21 +31,21 @@ import {assign} from '../obj.js';
  */
 
 
-/**
- * @classdesc
- * For layer sources that provide pre-rendered, tiled images in grids that are
- * organized by zoom levels for specific resolutions.
- * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}
- * property on the layer object; for example, setting `title: 'My Title'` in the
- * options means that `title` is observable, and has get/set accessors.
- *
- * @constructor
- * @extends {module:ol/layer/Layer}
- * @fires module:ol/render/Event~RenderEvent
- * @param {module:ol/layer/Tile~Options=} opt_options Tile layer options.
- * @api
- */
-class TileLayer {
+class TileLayer extends Layer {
+  /**
+   * @classdesc
+   * For layer sources that provide pre-rendered, tiled images in grids that are
+   * organized by zoom levels for specific resolutions.
+   * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}
+   * property on the layer object; for example, setting `title: 'My Title'` in the
+   * options means that `title` is observable, and has get/set accessors.
+   *
+   * @constructor
+   * @extends {module:ol/layer/Layer}
+   * @fires module:ol/render/Event~RenderEvent
+   * @param {module:ol/layer/Tile~Options=} opt_options Tile layer options.
+   * @api
+   */
   constructor(opt_options) {
     const options = opt_options ? opt_options : {};
 
@@ -53,7 +53,7 @@ class TileLayer {
 
     delete baseOptions.preload;
     delete baseOptions.useInterimTilesOnError;
-    Layer.call(this,  /** @type {module:ol/layer/Layer~Options} */ (baseOptions));
+    super(baseOptions);
 
     this.setPreload(options.preload !== undefined ? options.preload : 0);
     this.setUseInterimTilesOnError(options.useInterimTilesOnError !== undefined ?
@@ -109,8 +109,6 @@ class TileLayer {
   }
 }
 
-inherits(TileLayer, Layer);
-
 
 /**
  * Return the associated {@link module:ol/source/Tile tilesource} of the layer.