nfsd4: remove typoed replay field

Wow, I wonder how long that typo's been there.
Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>

fs/nfsd/state.h

@@ -312,7 +312,6 @@ struct nfs4_replay {
 	__be32			rp_status;
 	unsigned int		rp_buflen;
 	char			*rp_buf;
-	unsigned		intrp_allocated;
 	struct knfsd_fh		rp_openfh;
 	char			rp_ibuf[NFSD4_REPLAY_ISIZE];
 };