Improve tileLoadFunction docs

src/ol/tileloadfunction.js

@@ -1,22 +1,11 @@
 goog.provide('ol.TileLoadFunctionType');
-goog.provide('ol.TileVectorLoadFunctionType');
 
 
 /**
- * A function that takes an {@link ol.Tile} for the tile and a
- * `{string}` for the url as arguments.
+ * A function that takes an {@link ol.Tile} for the tile and a `{string}` for
+ * the url as arguments.
  *
  * @typedef {function(ol.Tile, string)}
  * @api
  */
 ol.TileLoadFunctionType;
-
-
-/**
- * A function that is called with a tile url for the features to load and
- * a callback that takes the loaded features as argument.
- *
- * @typedef {function(string, function(Array.<ol.Feature>))}
- * @api
- */
-ol.TileVectorLoadFunctionType;