Remove luci win trybot for now.
Remove luci win trybot for now.

It's has been timing out in a lot of my jobs recently, and for
others too, it appears.

Bug: chromium:749455
Change-Id: I7ee9b70328696d61a2bf41b798a92a55396bad70
Reviewed-on: https://webrtc-review.googlesource.com/38620
Commit-Queue: Patrik Höglund <b486136ee68458b09c92c86c39f451c87d6ef6a1@webrtc.org>
Reviewed-by: Edward Lemur <d05609f027dc667cc37492b1dc1bdea5d60fa82a@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#21551}
ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc