git: 98d06eea14a5 - main - sys: Enable -Wunused-but-set-variable for clang 15+.

From: John Baldwin <jhb_at_FreeBSD.org>
Date: Thu, 25 May 2023 17:45:05 UTC 
The branch main has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=98d06eea14a5056e22328140fee517a4f0612bf8

commit 98d06eea14a5056e22328140fee517a4f0612bf8
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2023-05-25 17:44:53 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2023-05-25 17:44:53 +0000

    sys: Enable -Wunused-but-set-variable for clang 15+.
    
    It was already enabled for older clang versions and GCC.
---
 sys/conf/kern.mk | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk
index be7e452bb6e3..9e977a6e4a01 100644
--- a/sys/conf/kern.mk
+++ b/sys/conf/kern.mk
@@ -46,12 +46,6 @@ CWARNEXTRA?=	-Wno-error=tautological-compare -Wno-error=empty-body \
 		-Wno-error=pointer-sign
 CWARNEXTRA+=	-Wno-error=shift-negative-value
 CWARNEXTRA+=	-Wno-address-of-packed-member
-.if ${COMPILER_VERSION} >= 150000
-# Clang 15 has much more aggressive diagnostics about
-# unused-but-set variables. Make these
-# non-fatal for the time being.
-CWARNEXTRA+=	-Wno-error=unused-but-set-variable
-.endif
 .endif	# clang
 
 .if ${COMPILER_TYPE} == "gcc"