[roll third_party/pigweed] pw_system: Remove redundant Bazel targets

Original-Bug: b/290359233
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/154497

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: f144ed6642a665d..629081583deb171
Roller-URL: https://ci.chromium.org/b/8775571685224519841
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I47b909a1094e46a68cb4aa4a162ee82b3a678828
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/155870
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 f144ed6..6290815 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f144ed6642a665df7eeb4693da4aaa7cb0141058
+Subproject commit 629081583deb17187a1be40c2b61c863c5ad6b3c