target/i386/kvm.c: Remove compatibility shim for KVM_HINTS_REALTIME

Now we've updated our copy of the kernel headers we can remove the
compatibility shim that handled KVM_HINTS_REALTIME not being defined.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180525132755.21839-7-peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

target/i386/kvm.c

@@ -47,11 +47,6 @@
 #include "exec/memattrs.h"
 #include "trace.h"
 
-/* Work around this kernel header constant changing its name */
-#ifndef KVM_HINTS_REALTIME
-#define KVM_HINTS_REALTIME KVM_HINTS_DEDICATED
-#endif
-
 //#define DEBUG_KVM
 
 #ifdef DEBUG_KVM