qcacld-3.0: Remove wlan_hdd_display_txrx_stats() prototype

The function wlan_hdd_display_txrx_stats() was removed as part of
datapath componentization in:
    qcacld-3.0: Code cleanup from HDD module
    Change-Id If5f1cf432b5c02848202debee7de696b2f20be9a

However the prototype was left behind, so remove it as well.

Change-Id: I9b41bceff4a149e3aaf2938713ad0ca4a6735aa6
CRs-Fixed: 3426033

core/hdd/src/wlan_hdd_stats.h

@@ -583,16 +583,6 @@ void wlan_cfg80211_mc_cp_stats_free_big_data_stats_event(
  */
 int wlan_hdd_get_temperature(struct hdd_adapter *adapter, int *temperature);
 
-/**
- * wlan_hdd_display_txrx_stats() - display HDD txrx stats summary
- * @hdd_ctx: hdd context
- *
- * Display TXRX Stats for all adapters
- *
- * Return: none
- */
-void wlan_hdd_display_txrx_stats(struct hdd_context *hdd_ctx);
-
 /**
  * hdd_get_max_tx_bitrate() - Get the max tx bitrate of the AP
  * @hdd_ctx: hdd context