roll: pigweed, pw_toolchain: pw_trace: Remove backend multiplexer
The ":null" backend is a reasonable default, so this change is a no-op:
I just remove an unnecessary layer of indirection.
Original-Bug: 347998044
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/219792
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https://pigweed.googlesource.com/pigweed/pigweed
pigweed, pw_toolchain Rolled-Commits: f219e65ac4075ab..4749e232d808939
Roller-URL: https://ci.chromium.org/b/8743413543664931409
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7cb9a25dc5ddd6998f14b95abc1b082407f5a864
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/220112
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
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/WORKSPACE b/WORKSPACE
index 7ef0770..591d9b8 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -84,8 +84,8 @@
     name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-07-03.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8743458863914510497.
-    commit = "f219e65ac4075ab917b293bd6b95c63538d035ec",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8743413543664931409.
+    commit = "4749e232d808939d3f083356376aa268ae552cc8",
     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 2024-07-03.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8743458863914510497.
-    commit = "f219e65ac4075ab917b293bd6b95c63538d035ec",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8743413543664931409.
+    commit = "4749e232d808939d3f083356376aa268ae552cc8",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed.git",
     strip_prefix = "pw_toolchain_bazel",
 )