remove deprecated imageSmoothing

src/ol/source/TileJSON.js

@@ -39,7 +39,6 @@ import {jsonp as requestJSONP} from '../net.js';
  * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that
  * you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.
  * See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.
- * @property {boolean} [imageSmoothing=true] Deprecated.  Use the `interpolate` option instead.
  * @property {boolean} [interpolate=true] Use interpolated values when resampling.  By default,
  * linear interpolation is used when resampling.  Set to false to use the nearest neighbor instead.
  * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.
@@ -75,17 +74,11 @@ class TileJSON extends TileImage {
    * @param {Options} options TileJSON options.
    */
   constructor(options) {
-    let interpolate =
-      options.imageSmoothing !== undefined ? options.imageSmoothing : true;
-    if (options.interpolate !== undefined) {
-      interpolate = options.interpolate;
-    }
-
     super({
       attributions: options.attributions,
       cacheSize: options.cacheSize,
       crossOrigin: options.crossOrigin,
-      interpolate: interpolate,
+      interpolate: options.interpolate,
       projection: getProjection('EPSG:3857'),
       reprojectionErrorThreshold: options.reprojectionErrorThreshold,
       state: 'loading',