roll: third_party/pigweed pw_thread: Remove bad defaults

This CL removes incorrect defaults for pw_thread.

Original-Bug: 392944758
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/263252
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 702dd6b1e67152c89ae9574db22745eac52a68c1

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 9446328fbf0968..702dd6b1e67152
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8724388914515621089
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4f332b1b8c061a0444fd93d6dacd1e30bb73d0e2
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/263393
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.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 9446328..702dd6b 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 9446328fbf096818e083169147958dadfc3fa06d
+Subproject commit 702dd6b1e67152c89ae9574db22745eac52a68c1