scsi: virtio_scsi: Remove duplicate check if queue is broken

virtqueue_enable_cb() will call virtqueue_poll() which will check if queue
is broken at beginning, so remove the virtqueue_is_broken() call

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Link: https://lore.kernel.org/r/20240116045836.12475-1-lirongqing@baidu.com
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>