NFSD: Clean up NFSDDBG_FACILITY macro

These are no longer needed because there are no dprintk() call sites
in these files.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

fs/nfsd/nfs3xdr.c

@@ -14,9 +14,6 @@
 #include "netns.h"
 #include "vfs.h"
 
-#define NFSDDBG_FACILITY		NFSDDBG_XDR
-
-
 /*
  * Force construction of an empty post-op attr
  */

fs/nfsd/nfsxdr.c

@@ -9,8 +9,6 @@
 #include "xdr.h"
 #include "auth.h"
 
-#define NFSDDBG_FACILITY		NFSDDBG_XDR
-
 /*
  * Mapping of S_IF* types to NFS file types
  */