[roll third_party/pigweed] pw_tokenizer: Remove some unused deps

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/169573

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: d131218b316c4fb..1db2bdcaf6f4e55
Roller-URL: https://ci.chromium.org/b/8770759390758758849
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ib3fbb091a6d59ba7bf246300be4ce6ff997796a2
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/169630
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 d131218..1db2bdc 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit d131218b316c4fb17bc3ca70ad1a351c4fc04cee
+Subproject commit 1db2bdcaf6f4e5507f9d8ea98d6887e77968e6cb