roll: third_party/pigweed pw_thread_stl: Remove unnecessary include

Fixes: b/362356045
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/254953
Original-Revision: 9fff2679767f9d396e24798bc513975cf1fe558a

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 8f3c17f63f19da..9fff2679767f9d
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8728144035380543249
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Idf251cdd816154054bd663e32693a45838ef428d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/255660
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 8f3c17f..9fff267 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 8f3c17f63f19da589759af3ee71f78888608f8e7
+Subproject commit 9fff2679767f9d396e24798bc513975cf1fe558a