Move assertion messages into code and deprecate AssertionError

test/node/ol/AssertionError.test.js

@@ -1,6 +1,5 @@
 import AssertionError from '../../../src/ol/AssertionError.js';
 import expect from '../expect.js';
-import {VERSION} from '../../../src/ol/util.js';
 
 describe('ol/AssertionError.js', function () {
   it('generates an error', function () {
@@ -10,11 +9,8 @@ describe('ol/AssertionError.js', function () {
 
   it('generates a message with a versioned url', function () {
     const error = new AssertionError(42);
-    const path = VERSION ? VERSION.split('-')[0] : 'latest';
     expect(error.message).to.be(
-      'Assertion failed. See https://openlayers.org/en/' +
-        path +
-        '/doc/errors/#42 for details.'
+      'Assertion failed. Question unknown, the answer is 42.'
     );
   });