[roll third_party/pigweed] bazel: Remove unnecessary .bazelrc flag

Original-Bug: 319665090
Test: bazel build //...
Test: bazel test --//pw_rpc:config_override=//pw_grpc:pw_rpc_config //pw_grpc:integration_test
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/208659
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 55a0e49ae0aae5d..807b25704367768
Roller-URL: https://ci.chromium.org/b/8748632470128649937
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I16485da8c7e59b5cf6f6f0d5b7c0dcbbaf1014cc
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/208575
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 55a0e49..807b257 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 55a0e49ae0aae5d6b056b774705b457734d980cd
+Subproject commit 807b257043677683c80868b28044279f7884cd93