feat(takeWhile): Reverted the backward compatibility changes as reque…

…sted.

compat/operator/takeWhile.ts

@@ -34,13 +34,9 @@ import { takeWhile as higherOrder } from 'rxjs/operators';
  * @return {Observable<T>} An Observable that emits the values from the source
  * Observable so long as each value satisfies the condition defined by the
  * `predicate`, then completes.
- * @param {boolean} inclusive When set to `true` the value that caused
- * `predicate` to return `false` will also be emitted.
  * @method takeWhile
  * @owner Observable
  */
-export function takeWhile<T>(this: Observable<T>,
-                             predicate: (value: T, index: number) => boolean,
-                             inclusive?: boolean): Observable<T> {
-  return higherOrder<T>(predicate, inclusive)(this);
+export function takeWhile<T>(this: Observable<T>, predicate: (value: T, index: number) => boolean): Observable<T> {
+  return higherOrder(predicate)(this);
 }