qcacld-3.0: Remove wlan_hdd_request_station_stats() prototype

Change Id685e9d94f185ee562f21d12d118e94a737a6a7e ("qcacld-3.0: Add
implementation of get_station_stats") added a prototype for function
wlan_hdd_request_station_stats() but did not add an implementation. As
a result the prototype is pointless, so remove it.

Change-Id: Idc9228bc75a8b1fae9681a1ecf290fa5f37c74f3
CRs-Fixed: 2378315

core/hdd/src/wlan_hdd_stats.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2019 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -455,14 +455,6 @@ int wlan_hdd_get_station_stats(struct hdd_adapter *adapter);
  */
 int wlan_hdd_get_temperature(struct hdd_adapter *adapter, int *temperature);
 
-/**
- * wlan_hdd_request_station_stats() - Get station statistics
- * @adapter: adapter for which statistics are desired
- *
- * Return: QDF_STATUS_SUCCESS if adapter's statistics were updated
- */
-int wlan_hdd_request_station_stats(struct hdd_adapter *adapter);
-
 /**
  * wlan_hdd_display_txrx_stats() - display HDD txrx stats summary
  * @hdd_ctx: hdd context