Remove deprecated old-args feature.

redo.py

@@ -15,7 +15,6 @@ shuffle    randomize the build order to find dependency bugs
 debug-locks  print messages about file locking (useful for debugging)
 debug-pids   print process ids as part of log messages (useful for debugging)
 version    print the current version and exit
-old-args   use old-style definitions of $1,$2,$3 (deprecated)
 """
 o = options.Options(optspec)
 (opt, flags, extra) = o.parse(sys.argv[1:])
@@ -40,8 +39,6 @@ if opt.debug_locks:
     os.environ['REDO_DEBUG_LOCKS'] = '1'
 if opt.debug_pids:
     os.environ['REDO_DEBUG_PIDS'] = '1'
-if opt.old_args:
-    os.environ['REDO_OLD_ARGS'] = '1'
 
 import vars_init
 vars_init.init(targets)