linux-user: Remove MAX_SIGQUEUE_SIZE
It's been unused for 7 years since 907f5fddaa67 when linux-user stopped
queueing any signals.
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220116204423.16133-2-imp@bsdimp.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>