nfs prototypes no longer required.

src/include/etherboot.h

 #endif
 extern void cleanup P((void));
 
-/* nfs.c */
-extern void rpc_init(void);
-extern int nfs P((const char *name, int (*)(unsigned char *, unsigned int, unsigned int, int)));
-extern void nfs_umountall P((int));
-
 /* proto_slam.c */
 extern int url_slam P((const char *name, int (*fnc)(unsigned char *, unsigned int, unsigned int, int)));