KVM: s390: remove myself as reviewer

I currently don't have time anymore to review KVM/s390
code.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Link: https://lore.kernel.org/r/20211006160120.217636-2-cohuck@redhat.com


Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>