make: remove SCCS ident stuff

@@ -22,15 +22,11 @@
  */
 /*
  * 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);