make: remove SCCS ident stuff

*** 22,36 ****
   */
  /*
   * Copyright 1994 Sun Microsystems, Inc. All rights reserved.
   * Use is subject to license terms.
   */
- /*
-  * @(#)read.h 1.2 06/12/12
-  */
  
- #pragma ident   "@(#)read.h     1.2     06/12/12"
  
  #include <mksh/defs.h>
  
  extern Source   get_next_block_fn(register Source source);
  
--- 22,32 ----