qapi: remove the misc-target.json file

qapi: remove the misc-target.json file

This file is now empty and can thus be removed.

Observe the pre-existing bug with s390-skeys.c and target/i386/monitor.c
both including qapi-commands-misc-target.h despite not requiring it.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250522190542.588267-8-pierrick.bouvier@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>