Merge pull request #408 from ReactiveX/jakew/remove-negative-check/2018-01-02

Remove superfluous negative check.

Author: JakeWharton

rxandroid/src/main/java/io/reactivex/android/schedulers/HandlerScheduler.java

@@ -69,7 +69,7 @@ public Disposable schedule(Runnable run, long delay, TimeUnit unit) {
             Message message = Message.obtain(handler, scheduled);
             message.obj = this; // Used as token for batch disposal of this worker's runnables.
 
-            handler.sendMessageDelayed(message, Math.max(0L, unit.toMillis(delay)));
+            handler.sendMessageDelayed(message, unit.toMillis(delay));
 
             // Re-check disposed state for removing in case we were racing a call to dispose().
             if (disposed) {