virtio-serial: Drop useless property is_console

All you could ever achieve with it is break stuff, so removing it
should be safe.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>

hw/virtio-console.c

@@ -91,7 +91,6 @@ static int virtconsole_initfn(VirtIOSerialPort *port)
 {
     VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
 
-    port->is_console_dummy = true;
     return generic_port_init(vcon, port);
 }
 
@@ -117,7 +116,6 @@ static VirtIOSerialPortInfo virtconsole_info = {
     .init          = virtconsole_initfn,
     .exit          = virtconsole_exitfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT8("is_console", VirtConsole, port.is_console_dummy, 1),
         DEFINE_PROP_UINT32("nr", VirtConsole, port.id, VIRTIO_CONSOLE_BAD_ID),
         DEFINE_PROP_CHR("chardev", VirtConsole, chr),
         DEFINE_PROP_STRING("name", VirtConsole, port.name),

hw/virtio-serial.h

@@ -124,9 +124,6 @@ struct VirtIOSerialPort {
      */
     QEMUBH *bh;
 
-    /* For property backward compatibility, not used otherwise */
-    uint8_t is_console_dummy;
-
     /* Is the corresponding guest device open? */
     bool guest_connected;
     /* Is this device open for IO on the host? */