Remove the deprecated -realtime option

It has been marked as deprecated since QEMU v4.2, replaced by
the -overcommit option. Time to remove it now.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20201210155808.233895-4-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 files changed