cros_async: Don't wake wakers on removal
cros_async: Don't wake wakers on removal

There is no need to repoll the waker after it is canceled. This was a
copy paste error that was harmless until tested with futures-rs
combinators that re-use wakers aggressively.

Change-Id: Ie84778b96ff6aa2b58bfe61cd96a78786797ad78
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2173971
Tested-by: Dylan Reid <c791bfe44996c1eed9c7149a0c5f12a86d58eb85@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Commit-Queue: Dylan Reid <c791bfe44996c1eed9c7149a0c5f12a86d58eb85@chromium.org>
Reviewed-by: Stephen Barber <7719587e4b5a49340661b214ec85602f3918d06f@chromium.org>
Reviewed-by: Chirantan Ekbote <35787c0e27de5c48735e07f8324823b765e8bcbc@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm