[roll third_party/pigweed] pw_rpc: Remove deprecated headers

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57061

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: e5a5f380c4be312..f1525dfe93eb04a
Roller-URL: https://ci.chromium.org/b/8838976355358661648
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8838976355358661648
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9615bff2622052d7d1e0f8e12b393793d5dbd68e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/57120
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index e5a5f38..f1525df 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit e5a5f380c4be312401457ba642d298c75045feca
+Subproject commit f1525dfe93eb04af72e95c25f74b99b43583128b