update modernc.org/sqlite to v1.37.0-concurrrency-workaround (#3958)

vendor/modernc.org/libc/libc_musl.go

@@ -229,29 +229,6 @@ func CString(s string) (uintptr, error) {
 	return p, nil
 }
 
-// GoBytes returns a byte slice from a C char* having length len bytes.
-func GoBytes(s uintptr, len int) []byte {
-	return unsafe.Slice((*byte)(unsafe.Pointer(s)), len)
-}
-
-// GoString returns the value of a C string at s.
-func GoString(s uintptr) string {
-	if s == 0 {
-		return ""
-	}
-
-	var buf []byte
-	for {
-		b := *(*byte)(unsafe.Pointer(s))
-		if b == 0 {
-			return string(buf)
-		}
-
-		buf = append(buf, b)
-		s++
-	}
-}
-
 func mustMalloc(sz Tsize_t) (r uintptr) {
 	if r = Xmalloc(nil, sz); r != 0 || sz == 0 {
 		return r