test: remove contents of main.ts from polyfill tests

These test do not need the contents of the `main.ts`

Author: alan-agius4

packages/angular/build/src/builders/application/tests/options/polyfills_spec.ts

@@ -20,9 +20,7 @@ describeBuilder(buildApplication, APPLICATION_BUILDER_INFO, (harness) => {
     for (const [suitName, baseUrl] of testsVariants) {
       describe(suitName, () => {
         beforeEach(async () => {
-          beforeEach(async () => {
-            await harness.writeFile('src/main.ts', 'console.log("TEST");');
-          });
+          await harness.writeFile('src/main.ts', 'console.log("TEST");');
 
           await harness.modifyFile('tsconfig.json', (content) => {
             const tsconfig = JSON.parse(content);

tests/legacy-cli/e2e/tests/basic/test.ts

@@ -21,9 +21,6 @@ export default async function () {
             require('karma-coverage'),
             require('@angular-devkit/build-angular/plugins/karma')
           ],
-          client: {
-            clearContext: false // leave Jasmine Spec Runner output visible in browser
-          },
           reporters: ['progress', 'kjhtml'],
           port: 9876,
           colors: true,