Remove opt_this param in forDataAtCoordinate function

src/ol/source/UTFGrid.js

@@ -138,25 +138,23 @@ export class CustomTile extends Tile {
    * Calls the callback (synchronously by default) with the available data
    * for given coordinate (or `null` if not yet loaded).
    * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
-   * @param {function(this: T, *): void} callback Callback.
+   * @param {function(*): void} callback Callback.
-   * @param {T=} opt_this The object to use as `this` in the callback.
    * @param {boolean=} opt_request If `true` the callback is always async.
    *                               The tile data is requested if not yet loaded.
-   * @template T
    */
-  forDataAtCoordinate(coordinate, callback, opt_this, opt_request) {
+  forDataAtCoordinate(coordinate, callback, opt_request) {
     if (this.state == TileState.IDLE && opt_request === true) {
       listenOnce(this, EventType.CHANGE, function(e) {
-        callback.call(opt_this, this.getData(coordinate));
+        callback(this.getData(coordinate));
       }, this);
       this.loadInternal_();
     } else {
       if (opt_request === true) {
         setTimeout(function() {
-          callback.call(opt_this, this.getData(coordinate));
+          callback(this.getData(coordinate));
         }.bind(this), 0);
       } else {
-        callback.call(opt_this, this.getData(coordinate));
+        callback(this.getData(coordinate));
       }
     }
   }
@@ -391,7 +389,7 @@ class UTFGrid extends TileSource {
         coordinate, resolution);
       const tile = /** @type {!CustomTile} */(this.getTile(
         tileCoord[0], tileCoord[1], tileCoord[2], 1, this.getProjection()));
-      tile.forDataAtCoordinate(coordinate, callback, null, opt_request);
+      tile.forDataAtCoordinate(coordinate, callback, opt_request);
     } else {
       if (opt_request === true) {
         setTimeout(function() {