make: remove SCCS ident stuff

*** 20,34 ****
   */
  /*
   * 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>
  
--- 20,30 ----