[roll third_party/pigweed] pw_grpc: Remove send queue timeout

It's not possible to safely clean up after a timeout since the writer
could be using both the request and buffer still.

Bug filed to add back timeout support.

Original-Bug: b/345088816
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/214099
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https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: c3bd8feb64c0b7f..f63576c7a25f36b
Roller-URL: https://ci.chromium.org/b/8745991445047130673
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic42db165f43545a626745f372220015e3220ff9e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/214114
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index c3bd8fe..f63576c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c3bd8feb64c0b7f199d4aeb26e3efb0fc7491beb
+Subproject commit f63576c7a25f36ba951cbb043a89c4f5fc61c006