message: refactor(forms): removing a workaround comment
  The code is clearer without the reduce, let's just remove the comment.
  PR Close
diff: @@ -586,9 +586,6 @@ export function toObservable(value: any): Observable<any> {
  function mergeErrors(arrayOfErrors: (ValidationErrors|null)[]): ValidationErrors|null {
  let res: {[key: string]: any} = {};
  -
  - // Not using Array.reduce here due to a Chrome 80 bug
  - // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
  arrayOfErrors.forEach((errors: ValidationErrors|null) => {
  res = errors != null ? {...res!, ...errors} : res!;
  });
  