9704 move socket functions to libc

@@ -198,20 +198,10 @@
  * defined in _getsp.s
  */
 extern greg_t _getsp(void);
 
 /*
- * defined in _so_setsockopt.s
- */
-extern int _so_setsockopt(int, int, int, const char *, int);
-
-/*
- * defined in _so_getsockopt.s
- */
-extern int _so_getsockopt(int, int, int, char *, int *);
-
-/*
  * defined in lsign.s
  */
 extern int lsign(dl_t);
 
 /*