relations: Inline relatename() into its only caller rela()

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>

src/lib/commands/rela.c

@@ -75,7 +75,9 @@ rela(void)
 		continue;
 	}
 	pr("%3d) %-20.20s  ", cn, cname(cn));
-	pr("%-10s %s\n", relatename(natp, cn), relatename(np, as));
+	pr("%-10s %s\n",
+	   relations_string(getrel(natp, cn)),
+	   relations_string(getrel(np, as)));
     }
     return RET_OK;
 }

src/lib/common/nat.c

@@ -51,12 +51,6 @@ cname(natid n)
     return np->nat_cnam;
 }
 
-char *
-relatename(struct natstr *np, natid other)
-{
-    return relations_string(getrel(np, other));
-}
-
 char *
 natstate(struct natstr *np)
 {