Only build asm with --non-matching

configure.py

@@ -71,11 +71,6 @@ parser.add_argument(
     action="store_true",
     help="generate map file(s)",
 )
-parser.add_argument(
-    "--no-asm",
-    action="store_true",
-    help="don't incorporate .s files from asm directory",
-)
 parser.add_argument(
     "--debug",
     action="store_true",
@@ -128,7 +123,8 @@ config.non_matching = args.non_matching
 config.sjiswrap_path = args.sjiswrap
 if not is_windows():
     config.wrapper = args.wrapper
-if args.no_asm:
+# Don't build asm unless we're --non-matching
+if not config.non_matching:
     config.asm_dir = None
 
 # Tool versions