xen/public: remove some unused defines from xs_wire.h

xs_wire.h contains some defines XS_WRITE_* which seem to be leftovers
from some decades ago. They haven't been used in the Xen tree since at
least Xen 2.0 and they make no sense anyway.

Remove them, as they seem not to be related to any Xen interface we
have today.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/include/public/io/xs_wire.h

@@ -41,10 +41,6 @@ enum xsd_sockmsg_type
     XS_INVALID = 0xffff /* Guaranteed to remain an invalid type */
 };
 
-#define XS_WRITE_NONE "NONE"
-#define XS_WRITE_CREATE "CREATE"
-#define XS_WRITE_CREATE_EXCL "CREATE|EXCL"
-
 /* We hand errors as strings, for portability. */
 struct xsd_errors
 {