chore: remove vendored deps/asprintf

vasprintf/asprintf are provided by devkitpro newlib (<stdio.h>).
deps/asprintf was never compiled by CMake (GLOB_RECURSE covers src/ only).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

deps/asprintf/asprintf.c

@@ -1,37 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "asprintf.h"
-
-int vasprintf(char **strp, const char *fmt, va_list ap) {
-	int size, res;
-
-	va_list cp;
-	va_copy(cp, ap);
-	size = vsnprintf(NULL, 0, fmt, cp);
-	va_end(cp);
-	if (size < 0)
-		return -1;
-
-	*strp = (char *)malloc(size + 1);
-	if (*strp == NULL)
-		return -1;
-
-	res = vsnprintf(*strp, size + 1, fmt, ap);
-	if (res < 0) {
-		free(*strp);
-		return -1;
-	}
-
-	return res;
-}
-
-int asprintf(char **s, const char *fmt, ...) {
-	int ret;
-
-	va_list ap;
-	va_start(ap, fmt);
-	ret = vasprintf(s, fmt, ap);
-	va_end(ap);
-	return ret;
-}

deps/asprintf/asprintf.h

@@ -1,10 +0,0 @@
-#ifndef HAVE_ASPRINTF
-#define HAVE_ASPRINTF 1
-
-#include <stdarg.h>
-
-int vasprintf(char **strp, const char *fmt, va_list ap);
-
-int asprintf(char **s, const char *fmt, ...);
-
-#endif

deps/asprintf/clib.json

@@ -1,9 +0,0 @@
-{
-	"name": "asprintf",
-	"version": "1.0.0",
-	"repo": "Neved4/asprintf",
-	"description": "asprintf, vasprintf - print to allocated string",
-	"license": "MIT",
-	"keywords": ["asprintf", "sprintf", "alloc", "string"],
-	"src": ["asprintf.c", "asprintf.h"]
-}