roll: pigweed pw_build: Remove and refactor //pw_build/platforms

Hardware definitions belong //targets and should not be referenced
by upstream projects.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/255063
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 090c43754889c437290f8d27b6706fdb2a4978af

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 8ebf76dd7c5d0b..090c43754889c4
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8728171806210483233
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4f55b46d4463c61a99e431d25c0aab8cd43449f3
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/255653
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/MODULE.bazel b/MODULE.bazel
index 99e2bc1..92e1be5 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -41,8 +41,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-12-18.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8728182838256572609.
-    commit = "8ebf76dd7c5d0b7c3daa0e0c7e7470b610a2ee2f",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8728171806210483233.
+    commit = "090c43754889c437290f8d27b6706fdb2a4978af",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
@@ -50,8 +50,8 @@
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-12-18.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8728182838256572609.
-    commit = "8ebf76dd7c5d0b7c3daa0e0c7e7470b610a2ee2f",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8728171806210483233.
+    commit = "090c43754889c437290f8d27b6706fdb2a4978af",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )