roll: third_party/pigweed pw_interrupt_xtensa: Remove module

This module can't work correctly without OS support, so remove in favor
using the OS specific backends (freertos, zephyr).

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/279415
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Tests-Not-Needed: Austin Foxley <afoxley@google.com>
Original-Revision: 97a53b135bfb91c7e570195fcbed7ac0101e8c3a

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: b423fb823cb518..97a53b135bfb91
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8718794660919978257
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia5c428bb57820470ef5a2f34ac1ad450eda483d8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/280534
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/third_party/pigweed b/third_party/pigweed
index b423fb8..97a53b1 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit b423fb823cb518846f1335bfd6814d9054980cdb
+Subproject commit 97a53b135bfb91c7e570195fcbed7ac0101e8c3a