message: refactor(common): remove unnecesary `null`
  These null values are unused and unecessary. I suspect it's a remnant from when the codebase was transpiled to Dart.
  PR Close
diff: @@ -240,5 +240,5 @@ export class MockPlatformLocation implements PlatformLocation {
  }
  export function scheduleMicroTask(cb: () => any) {
  - Promise.resolve(null).then(cb);
  + Promise.resolve().then(cb);
  }
  