qcacld-3.0: Remove wlan_hdd_restart_driver() prototype

wlan_hdd_main.h currently exports wlan_hdd_restart_driver() but the
function is not present, so remove the obsolete prototype.

Change-Id: I98b6bc8aa3689cbda3f989f055a7632148c1bfba
CRs-Fixed: 2106852

core/hdd/inc/wlan_hdd_main.h

@@ -1959,7 +1959,6 @@ void hdd_prevent_suspend_timeout(uint32_t timeout, uint32_t reason);
 
 void wlan_hdd_cfg80211_update_wiphy_caps(struct wiphy *wiphy);
 QDF_STATUS hdd_set_ibss_power_save_params(struct hdd_adapter *pAdapter);
-QDF_STATUS wlan_hdd_restart_driver(struct hdd_context *hdd_ctx);
 void hdd_exchange_version_and_caps(struct hdd_context *hdd_ctx);
 int wlan_hdd_validate_context(struct hdd_context *hdd_ctx);