staging: r8188eu: remove include/h2clbk.h

No one uses this file, so remove it from the tree.

Link: https://lore.kernel.org/r/20210730092417.1014392-4-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/h2clbk.h

-/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
-/* Copyright(c) 2007 - 2011 Realtek Corporation. */
-
-#define _H2CLBK_H_
-
-#include <rtl8711_spec.h>
-#include <TypeDef.h>
-
-void _lbk_cmd(struct adapter *adapter);
-
-void _lbk_rsp(struct adapter *adapter);
-
-void _lbk_evt(IN struct adapter *adapter);
-
-void h2c_event_callback(unsigned char *dev, unsigned char *pbuf);