Remove deprecated inherits function

changelog/upgrade-notes.md

@@ -4,6 +4,11 @@
 
 #### Backwards incompatible changes
 
+##### Removal of the deprecated "inherits" function
+
+The `inherits` function that was used to inherit the prototype methods from one constructor into another has been removed.
+The standard ECMAScript classes should be used instead.
+
 ##### New internal tile coordinates
 
 Previously, the internal tile coordinates used in the library had an unusual row order – the origin of the tile coordinate system was at the top left as expected, but the rows increased upwards.  This meant that all tile coordinates within a tile grid's extent had negative `y` values.

doc/tutorials/background.md

@@ -44,6 +44,6 @@ import {Tile, Vector} from 'ol/layer';
 In addition to these re-exported classes, modules with lowercase names also provide constants or functions as named exports:
 
 ```js
-import {inherits} from 'ol';
+import {getUid} from 'ol';
 import {fromLonLat} from 'ol/proj';
 ```

src/ol/index.js

@@ -30,5 +30,4 @@ export {default as VectorRenderTile} from './VectorRenderTile.js';
 export {default as VectorTile} from './VectorTile.js';
 export {default as View} from './View.js';
 
-export {getUid, inherits, VERSION} from './util.js';
-
+export {getUid, VERSION} from './util.js';

src/ol/util.js

@@ -11,34 +11,6 @@ export function abstract() {
   })());
 }
 
-/**
- * Inherit the prototype methods from one constructor into another.
- *
- * Usage:
- *
- *     function ParentClass(a, b) { }
- *     ParentClass.prototype.foo = function(a) { }
- *
- *     function ChildClass(a, b, c) {
- *       // Call parent constructor
- *       ParentClass.call(this, a, b);
- *     }
- *     inherits(ChildClass, ParentClass);
- *
- *     var child = new ChildClass('a', 'b', 'see');
- *     child.foo(); // This works.
- *
- * @param {!Function} childCtor Child constructor.
- * @param {!Function} parentCtor Parent constructor.
- * @function module:ol.inherits
- * @deprecated
- * @api
- */
-export function inherits(childCtor, parentCtor) {
-  childCtor.prototype = Object.create(parentCtor.prototype);
-  childCtor.prototype.constructor = childCtor;
-}
-
 /**
  * Counter for getUid.
  * @type {number}