KVM: remove deprecated UAPIs

The deprecated interfaces were removed 15 years ago.  KVM's
device assignment was deprecated in 4.2 and removed 6.5 years
ago; the only interest might be in compiling ancient versions
of QEMU, but QEMU has been using its own imported copy of the
kernel headers since June 2011.  So again we go into archaeology
territory; just remove the cruft.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

virt/kvm/kvm_main.c

@@ -5497,11 +5497,6 @@ static long kvm_dev_ioctl(struct file *filp,
 		r += PAGE_SIZE;    /* coalesced mmio ring page */
 #endif
 		break;
-	case KVM_TRACE_ENABLE:
-	case KVM_TRACE_PAUSE:
-	case KVM_TRACE_DISABLE:
-		r = -EOPNOTSUPP;
-		break;
 	default:
 		return kvm_arch_dev_ioctl(filp, ioctl, arg);
 	}