6583 remove whole-process swapping

@@ -250,14 +250,10 @@
         uint64_t pgfrec;                /* page reclaims from free list */
         uint64_t pgin;                  /* pageins */
         uint64_t pgpgin;                /* pages paged in */
         uint64_t pgout;                 /* pageouts */
         uint64_t pgpgout;               /* pages paged out */
-        uint64_t swapin;                /* swapins */
-        uint64_t pgswapin;              /* pages swapped in */
-        uint64_t swapout;               /* swapouts */
-        uint64_t pgswapout;             /* pages swapped out */
         uint64_t zfod;                  /* pages zero filled on demand */
         uint64_t dfree;                 /* pages freed by daemon or auto */
         uint64_t scan;                  /* pages examined by pageout daemon */
         uint64_t rev;                   /* revolutions of page daemon hand */
         uint64_t hat_fault;             /* minor page faults via hat_fault() */