Remove mock based tests

'should not throw when no routes' does not make much sense as the router DOES throw if there are no routes

The other test just tests what is better tested by the rest of the tests

Author: Artur-

packages/ts/file-router/test/mocks/react-router.ts

@@ -4,7 +4,6 @@ import { createElement } from 'react';
 import sinonChai from 'sinon-chai';
 import { RouterConfigurationBuilder } from '../../src/runtime/RouterConfigurationBuilder.js';
 import { mockDocumentBaseURI } from '../mocks/dom.js';
-import { browserRouter, createBrowserRouter } from '../mocks/react-router.js';
 import { protectRoute } from '../mocks/vaadin-hilla-react-auth.js';
 
 use(chaiLike);
@@ -642,11 +641,6 @@ describe('RouterBuilder', () => {
       ]);
     });
 
-    it('should not throw when no routes', () => {
-      const { routes } = new RouterConfigurationBuilder().withLayout(Server).build();
-
-      expect(routes).to.be.like([]);
-    });
   });
 
   describe('withLayoutSkipping', () => {
@@ -811,13 +805,4 @@ describe('RouterBuilder', () => {
     });
   });
 
-  describe('build', () => {
-    it('should build the router', () => {
-      const { routes, router } = builder.build();
-
-      expect(router).to.equal(browserRouter);
-      expect(createBrowserRouter).to.have.been.calledWith(routes, { basename: '/foo' });
-      reset();
-    });
-  });
 });