[roll third_party/pigweed] pw_build/cmake: Remove deprecated function

Now that _pw_parse_argv_strict is no longer used downstream, remove
it.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/94166

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: af32de572d37fd9..f3ba3aa972998d3
Roller-URL: https://ci.chromium.org/b/8814260661695150161
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8814260661695150161
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic6e1907419f763ae6f694977f17949d62dce438f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/94541
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 af32de5..f3ba3aa 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit af32de572d37fd94cb18695d579c76925b5ce115
+Subproject commit f3ba3aa972998d3a422bce32ce54e854ea2c12e7