6583 remove whole-process swapping

@@ -93,11 +93,10 @@
         (faultcode_t (*)(struct seg *, caddr_t))
                 segnf_nomap,            /* faulta */
         segnf_setprot,
         segnf_checkprot,
         (int (*)())segnf_badop,         /* kluster */
-        (size_t (*)(struct seg *))NULL, /* swapout */
         (int (*)(struct seg *, caddr_t, size_t, int, uint_t))
                 segnf_nop,              /* sync */
         (size_t (*)(struct seg *, caddr_t, size_t, char *))
                 segnf_nop,              /* incore */
         (int (*)(struct seg *, caddr_t, size_t, int, int, ulong_t *, size_t))