roll: pigweed, pw_toolchain: pw_unit_test: Delete unsupported C++14 compatibilty code

Pigweed requires C++17, and code intended for compatibility with earlier
versions of C++ is never built or tested.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/229972

https://pigweed.googlesource.com/pigweed/pigweed
pigweed, pw_toolchain Rolled-Commits: 9b242113ab06e86..d97c1620775ac5c
Roller-URL: https://ci.chromium.org/b/8739426857803334145
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I26238e0fc54648a9f4266368ac8ed05290b5e6f1
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/230273
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>
diff --git a/MODULE.bazel b/MODULE.bazel
index 554abb9..44b8d6b 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -48,8 +48,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-08-16.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8739427256603302369.
-    commit = "9b242113ab06e86dff052bfa60b5e01fc6fd7f8a",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8739426857803334145.
+    commit = "d97c1620775ac5cb0a80c08913d70eda760e80bd",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
@@ -57,8 +57,8 @@
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-08-16.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8739427256603302369.
-    commit = "9b242113ab06e86dff052bfa60b5e01fc6fd7f8a",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8739426857803334145.
+    commit = "d97c1620775ac5cb0a80c08913d70eda760e80bd",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )