[roll third_party/pigweed] pw_boot: Remove duplicate import

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/110474

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: afaacb6b3fe2219..cbafaeeaf73a901
Roller-URL: https://ci.chromium.org/b/8802845443223905169
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I24413328f225da4036e323e9b4c45e19fd67f071
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/110700
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index afaacb6..cbafaee 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit afaacb6b3fe2219f700804f53161ef56a9c2a213
+Subproject commit cbafaeeaf73a901badd4fc47caeba6b59234bcfa