staging: wfx: drop module version

wfx_version.h says that this code is same same than driver 2.3.1 hosted
on github:

    https://github.com/siliconlabs/wfx-linux-driver/tree/2.3.1-public

However, it is inaccurate, driver in-tree contains multiple small
patches ahead 2.3.1.

I prefer to drop this confusing information.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191017093954.657-1-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/TODO

 This is a list of things that need to be done to get this driver out of the
 staging directory.
 
-  - wfx_version.h is still there in order to ensure synchronization with github.
-    It can be dropped as soon as development is entirely in kernel
-
   - I have to take a decision about secure link support. I can:
       - drop completely
       - keep it in an external patch (my preferred option)

drivers/staging/wfx/main.c

@@ -33,14 +33,12 @@
 #include "secure_link.h"
 #include "hif_tx_mib.h"
 #include "hif_api_cmd.h"
-#include "wfx_version.h"
 
 #define WFX_PDS_MAX_SIZE 1500
 
 MODULE_DESCRIPTION("Silicon Labs 802.11 Wireless LAN driver for WFx");
 MODULE_AUTHOR("Jérôme Pouiller <jerome.pouiller@silabs.com>");
 MODULE_LICENSE("GPL");
-MODULE_VERSION(WFX_LABEL);
 
 static int gpio_wakeup = -2;
 module_param(gpio_wakeup, int, 0644);
@@ -480,8 +478,6 @@ static int __init wfx_core_init(void)
 {
 	int ret = 0;
 
-	pr_info("wfx: Silicon Labs " WFX_LABEL "\n");
-
 	if (IS_ENABLED(CONFIG_SPI))
 		ret = spi_register_driver(&wfx_spi_driver);
 	if (IS_ENABLED(CONFIG_MMC) && !ret)

drivers/staging/wfx/wfx_version.h

-/* SPDX-License-Identifier: GPL-2.0-only */
-/* THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT! */
-#define WFX_LABEL "2.3.1"