[roll third_party/pigweed] pw_log_zephyr: Clean-up unused dependencies from TOKENIZED_LIB

Cleaning up tokenzied_lib library of unused dependencies.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/174813

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 45973d204731382..15d4c869cd9eff3
Roller-URL: https://ci.chromium.org/b/8767681721530326161
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I41ca9a98eb8e1fe0562e5ce4ff3e23c62454a61d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/175263
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 45973d2..15d4c86 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 45973d204731382264aa49868567c2378c0cfe7e
+Subproject commit 15d4c869cd9eff369967f697589daf06d3fe2112