Removed documentation leftover (#5076)

That wrongly states that the error will be swallowed

Author: PaulWoitaschek

src/main/java/io/reactivex/Completable.java

@@ -1708,8 +1708,6 @@ public final Disposable subscribe(final Action onComplete, final Consumer<? supe
      * If the Completable emits an error, it is wrapped into an
      * {@link io.reactivex.exceptions.OnErrorNotImplementedException OnErrorNotImplementedException}
      * and routed to the RxJavaPlugins.onError handler.
-     * <p>
-     * If this Completable emits an error, it is sent to RxJavaPlugins.onError and gets swallowed.
      * <dl>
      *  <dt><b>Scheduler:</b></dt>
      *  <dd>{@code subscribe} does not operate by default on a particular {@link Scheduler}.</dd>