libc x86: Remove index.S, strcpy.S, strchr.S

These files are never used.

Change-Id: Iab8474bdff3bd4d225597c62b3c0f0849f808818
diff --git a/libc/arch-x86/string/index.S b/libc/arch-x86/string/index.S
deleted file mode 100644
index 7f83ef5..0000000
--- a/libc/arch-x86/string/index.S
+++ /dev/null
@@ -1,26 +0,0 @@
-/*	$OpenBSD: index.S,v 1.4 2005/08/07 11:30:38 espie Exp $ */
-/*
- * Written by J.T. Conklin <jtc@netbsd.org>.
- * Public domain.
- */
-
-#include <machine/asm.h>
-
-#ifdef STRCHR
-ENTRY(strchr)
-#else
-ENTRY(index)
-#endif
-	movl	4(%esp),%eax
-	movb	8(%esp),%cl
-	.align 2,0x90
-L1:
-	movb	(%eax),%dl
-	cmpb	%dl,%cl			/* found char??? */
-	je 	L2
-	incl	%eax
-	testb	%dl,%dl			/* null terminator??? */
-	jnz	L1
-	xorl	%eax,%eax
-L2:
-	ret
diff --git a/libc/arch-x86/string/strchr.S b/libc/arch-x86/string/strchr.S
deleted file mode 100644
index f76e593..0000000
--- a/libc/arch-x86/string/strchr.S
+++ /dev/null
@@ -1,3 +0,0 @@
-/*	$OpenBSD: strchr.S,v 1.3 2005/08/07 11:30:38 espie Exp $ */
-#define STRCHR
-#include "index.S"
diff --git a/libc/arch-x86/string/strcpy.S b/libc/arch-x86/string/strcpy.S
deleted file mode 100644
index 7d9b87e..0000000
--- a/libc/arch-x86/string/strcpy.S
+++ /dev/null
@@ -1,64 +0,0 @@
-/*	$OpenBSD: strcpy.S,v 1.8 2005/08/07 11:30:38 espie Exp $ */
-/*
- * Written by J.T. Conklin <jtc@netbsd.org>.
- * Public domain.
- */
-
-#include <machine/asm.h>
-
-#if defined(APIWARN)
-#APP
-	.section .gnu.warning.strcpy
-	.ascii "warning: strcpy() is almost always misused, please use strlcpy()"
-#NO_APP
-#endif
-
-/*
- * NOTE: I've unrolled the loop eight times: large enough to make a
- * significant difference, and small enough not to totally trash the
- * cache.
- */
-
-ENTRY(strcpy)
-	movl	4(%esp),%ecx		/* dst address */
-	movl	8(%esp),%edx		/* src address */
-	pushl	%ecx			/* push dst address */
-
-	.align 2,0x90
-L1:	movb	(%edx),%al		/* unroll loop, but not too much */
-	movb	%al,(%ecx)
-	testb	%al,%al
-	jz	L2
-	movb	1(%edx),%al
-	movb	%al,1(%ecx)
-	testb	%al,%al
-	jz	L2
-	movb	2(%edx),%al
-	movb	%al,2(%ecx)
-	testb	%al,%al
-	jz	L2
-	movb	3(%edx),%al
-	movb	%al,3(%ecx)
-	testb	%al,%al
-	jz	L2
-	movb	4(%edx),%al
-	movb	%al,4(%ecx)
-	testb	%al,%al
-	jz	L2
-	movb	5(%edx),%al
-	movb	%al,5(%ecx)
-	testb	%al,%al
-	jz	L2
-	movb	6(%edx),%al
-	movb	%al,6(%ecx)
-	testb	%al,%al
-	jz	L2
-	movb	7(%edx),%al
-	movb	%al,7(%ecx)
-	addl	$8,%edx
-	addl	$8,%ecx
-	testb	%al,%al
-	jnz	L1
-L2:	popl	%eax			/* pop dst address */
-	ret
-END(strcpy)