remove defunct file:

panda/src/express/express_headers.h

@@ -1,43 +0,0 @@
-// Filename: xxx_headers.h
-// Created by:  georges (30May01)
-//
-////////////////////////////////////////////////////////////////////
-//
-// PANDA 3D SOFTWARE
-// Copyright (c) 2001 - 2004, Disney Enterprises, Inc.  All rights reserved
-//
-// All use of this software is subject to the terms of the Panda 3d
-// Software license.  You should have received a copy of this license
-// along with this source code; you will also find a current copy of
-// the license at http://etc.cmu.edu/panda3d/docs/license/ .
-//
-// To contact the maintainers of this program write to
-// [email protected] .
-//
-////////////////////////////////////////////////////////////////////
-
-#include "pandabase.h"
-#include <errno.h>
-#include <stdio.h>
-#include "pnotify.h"
-
-#include "clockObject.h"
-#include "config_express.h"
-#include "datagram.h"
-#include "datagramIterator.h"
-#include "error_utils.h"
-#include "hashVal.h"
-#include "indent.h"
-#include "memoryUsagePointers.h"
-#include "numeric_types.h"
-#include "profileTimer.h"
-#include "referenceCount.h"
-#include "trueClock.h"
-#include "typedef.h"
-#include "typedObject.h"
-#include "typedReferenceCount.h"
-
-#include <algorithm>
-
-#pragma hdrstop
-