roll: pigweed, pw_toolchain: rust: Fix clippy lints

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/217136
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
pigweed, pw_toolchain Rolled-Commits: 880f40d3709839d..7ad2bee3e541072
Roller-URL: https://ci.chromium.org/b/8744394233704695601
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia3ba82513e30f6516d0aea8df32f2ea0bdb3f4c4
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/217167
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 43bb1b6..a0dd81b 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -84,8 +84,8 @@
     name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-06-22.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8744394634346489665.
-    commit = "880f40d3709839dd7b88a5b1744eccdf943a90f3",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8744394233704695601.
+    commit = "7ad2bee3e541072231d8a59571a235435e36d344",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
 )
 
@@ -93,8 +93,8 @@
     name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-06-22.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8744394634346489665.
-    commit = "880f40d3709839dd7b88a5b1744eccdf943a90f3",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8744394233704695601.
+    commit = "7ad2bee3e541072231d8a59571a235435e36d344",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
     strip_prefix = "pw_toolchain_bazel",
 )