remove unused globals: save_cm, was_waterlevel

From entrez.  Since restoring was removed separately it was easier
to edit the files manually than to use his diff.

src/cmd.c

@@ -4502,13 +4502,9 @@ parse(void)
     }
 
     g.multi = g.command_count;
-
-    if (g.multi) {
+    if (g.multi)
         g.multi--;
-        g.save_cm = g.command_line;
-    } else {
-        g.save_cm = (char *) 0;
-    }
+
     /* in 3.4.3 this was in rhack(), where it was too late to handle M-5 */
     if (g.Cmd.pcHack_compat) {
         /* This handles very old inconsistent DOS/Windows behaviour

src/decl.c

@@ -262,7 +262,6 @@ const struct instance_globals g_init = {
     NULL, /* stairs */
     DUMMY, /* smeq */
     0, /* doorindex */
-    NULL, /* save_cm */
     0, /* done_money */
     0L, /* domove_attempting */
     0L, /* domove_succeeded */
@@ -466,7 +465,6 @@ const struct instance_globals g_init = {
 
     /* mkmaze.c */
     { {COLNO, ROWNO, 0, 0}, {COLNO, ROWNO, 0, 0} }, /* bughack */
-    FALSE, /* was_waterlevel */
     UNDEFINED_PTR, /* bbubbles */
     UNDEFINED_PTR, /* ebubbles */
     UNDEFINED_PTR, /* wportal */