make: remove SCCS ident stuff

@@ -20,15 +20,11 @@
  */
 /*
  * Copyright 1993 Sun Microsystems, Inc. All rights reserved.
  * Use is subject to license terms.
  */
-/*
- * @(#)chdir.cc 1.4 06/12/12
- */
 
-#pragma ident   "@(#)chdir.cc   1.4     06/12/12"
 
 #include <unistd.h>
 #include <vroot/vroot.h>
 #include <vroot/args.h>