undo part of "alternate symbol parsing"

Commit fddc966a3e included:
Add S_suit as another alternate for S_armor.

I got fooled by the description "suit or piece of armor" and was
thinking that each of the 7 armor slots had their own symbol that
could be overridden.

There's no need for S_suit when there isn't any S_helm, S_boots, &c.

src/symbols.c

@@ -855,7 +855,7 @@ match_sym(char *buf)
         const char *altnm;
         const char *nm;
     } alternates[] = {
-        { "S_armour", "S_armor" },     { "S_suit", "S_armor" },
+        { "S_armour", "S_armor" },
         /* alt explosion names are numbered in phone key/button layout */
         { "S_explode1", "S_expl_tl" },
         { "S_explode2", "S_expl_tc" }, { "S_explode3", "S_expl_tr" },