[roll third_party/pigweed] pw_build: Remove unused python_wheels.py

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/152910

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: c018d30fb3d4528..a40bef80ce8be20
Roller-URL: https://ci.chromium.org/b/8777482639266349761
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If8c5c5f06414bfa3056c5e0ab8263bf311e6b68c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/152902
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 c018d30..a40bef8 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c018d30fb3d45287e36bcd61ef534ad191df1b7f
+Subproject commit a40bef80ce8be203b92f046e3ae1a5f978718b63