[newlib-cygwin/cygwin-3_4-branch] Revert "Cygwin: x86_64: add wmemset assembler entry point"

[Jon TURNEY]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=98fa366cb68a0c297bbb4a64a2d86649709aeabb

commit 98fa366cb68a0c297bbb4a64a2d86649709aeabb
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Fri Dec 16 10:21:13 2022 +0000

    Revert "Cygwin: x86_64: add wmemset assembler entry point"
    
    This reverts commit 188d5f6c9ad5cbbd6f0fcb9aaf15bc9870597910.

Diff:
---
 winsup/cygwin/x86_64/memset.s | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/winsup/cygwin/x86_64/memset.s b/winsup/cygwin/x86_64/memset.s
index d3b95ecd2..ac73b6ace 100644
--- a/winsup/cygwin/x86_64/memset.s
+++ b/winsup/cygwin/x86_64/memset.s
@@ -67,11 +67,3 @@ L1:     rep
 	movq	16(%rsp),%rdi
 	ret
 	.seh_endproc
-
-	.globl  wmemset
-	.seh_proc wmemset
-wmemset:
-	.seh_endprologue
-	shlq	$1,%r8		/* cnt * sizeof (wchar_t) */
-	jmp	memset
-	.seh_endproc