SDL_string.c (SDL_vsscanf): fix gcc build

src/stdlib/SDL_string.c

@@ -1255,7 +1255,7 @@ static SDL_bool CharacterMatchesSet(char c, const char *set, size_t set_len)
 }
 
 /* NOLINTNEXTLINE(readability-non-const-parameter) */
-int SDL_vsscanf(const char *text, SDL_SCANF_FORMAT_STRING const char *fmt, va_list ap) SDL_SCANF_VARARG_FUNCV(2)
+int SDL_vsscanf(const char *text, SDL_SCANF_FORMAT_STRING const char *fmt, va_list ap)
 {
     int retval = 0;