message: refactor(forkJoin): remove unnecessary property
diff: @@ -156,7 +156,6 @@ export function forkJoin<T, R>(...sources: Array<ObservableInput<T> |
  */
  class ForkJoinSubscriber<T, R> extends OuterSubscriber<T, T> {
  private completed = 0;
  - private total: number;
  private values: T[];
  private haveValues = 0;
  @@ -166,7 +165,6 @@ class ForkJoinSubscriber<T, R> extends OuterSubscriber<T, T> {
  super(destination);
  const len = sources.length;
  - this.total = len;
  this.values = new Array(len);
  for (let i = 0; i < len; i++) {
  