hw/s390x/s390-virtio-ccw: Remove the deprecated 2.8 machine type

The s390-ccw-virtio-2.8 machine is older than 6 years, so according to
our machine support policy, it can be removed now.

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Message-ID: <20250103144232.520383-10-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/s390x/s390-virtio-ccw.c

@@ -1260,23 +1260,6 @@ static void ccw_machine_2_9_class_options(MachineClass *mc)
 }
 DEFINE_CCW_MACHINE(2, 9);
 
-static void ccw_machine_2_8_instance_options(MachineState *machine)
-{
-    ccw_machine_2_9_instance_options(machine);
-}
-
-static void ccw_machine_2_8_class_options(MachineClass *mc)
-{
-    static GlobalProperty compat[] = {
-        { TYPE_S390_FLIC_COMMON, "adapter_routes_max_batch", "64", },
-    };
-
-    ccw_machine_2_9_class_options(mc);
-    compat_props_add(mc->compat_props, hw_compat_2_8, hw_compat_2_8_len);
-    compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
-}
-DEFINE_CCW_MACHINE(2, 8);
-
 #endif
 
 static void ccw_machine_register_types(void)