pack_cis: Remove duplicate fclose()

No good can come of closing a file twice.  I wonder how this
ever worked.
diff --git a/lex_cis.l b/lex_cis.l
index 92316aa..3ae628e 100644
--- a/lex_cis.l
+++ b/lex_cis.l
@@ -3,8 +3,6 @@
 
 %{
 /*
- * lex_cis.l 1.15 2001/08/24 12:21:41
- *
  * The contents of this file are subject to the Mozilla Public License
  * Version 1.1 (the "License"); you may not use this file except in
  * compliance with the License. You may obtain a copy of the License
@@ -229,6 +227,5 @@
     current_lineno = 1;
     yyrestart(f);
     yyparse();
-    fclose(f);
 }