qcacld-3.0: Remove wlan_hdd_cfg80211_stats_ext_init()

wlan_hdd_stats.h currently defines the stub function
wlan_hdd_cfg80211_stats_ext_init() which is unused, so remove it.

Change-Id: If2ab73f29a3c55b8a77d10c131f4a2cd950e883a
CRs-Fixed: 2106849

core/hdd/src/wlan_hdd_stats.h

@@ -226,8 +226,6 @@ int wlan_hdd_cfg80211_stats_ext_request(struct wiphy *wiphy,
 					const void *data,
 					int data_len);
 
-#else
-static inline void wlan_hdd_cfg80211_stats_ext_init(struct hdd_context *hdd_ctx) {}
 #endif /* End of WLAN_FEATURE_STATS_EXT */
 
 /**