s390/virtio: remove the old KVM virtio transport

There is no recent user space application available anymore which still
supports this old virtio transport. Additionally, commit 3b2fbb3f06
("virtio/s390: deprecate old transport") introduced a deprecation message
in the driver, and apparently nobody complained so far that it is still
required. So let's simply remove it.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/Kconfig

@@ -929,17 +929,4 @@ config S390_GUEST
 	  Select this option if you want to run the kernel as a guest under
 	  the KVM hypervisor.
 
-config S390_GUEST_OLD_TRANSPORT
-	def_bool y
-	prompt "Guest support for old s390 virtio transport (DEPRECATED)"
-	depends on S390_GUEST
-	help
-	  Enable this option to add support for the old s390-virtio
-	  transport (i.e. virtio devices NOT based on virtio-ccw). This
-	  type of virtio devices is only available on the experimental
-	  kuli userspace or with old (< 2.6) qemu. If you are running
-	  with a modern version of qemu (which supports virtio-ccw since
-	  1.4 and uses it by default since version 2.4), you probably won't
-	  need this.
-
 endmenu

drivers/s390/virtio/Makefile

@@ -7,7 +7,4 @@
 # as published by the Free Software Foundation.
 
 s390-virtio-objs := virtio_ccw.o
-ifdef CONFIG_S390_GUEST_OLD_TRANSPORT
-s390-virtio-objs += kvm_virtio.o
-endif
 obj-$(CONFIG_S390_GUEST) += $(s390-virtio-objs)