make: remove SCCS ident stuff

*** 20,34 ****
   */
  /*
   * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
   * Use is subject to license terms.
   */
- /*
-  * @(#)implicit.cc 1.64 06/12/12
-  */
- 
- #pragma ident   "@(#)implicit.cc        1.64    06/12/12"
  
  /*
   *      implicit.c
   *
   *      Handle suffix and percent rules
--- 20,29 ----