qcacld-3.0: Remove obsolete STA support for SIOCGIWAUTH

At one time the predecessor to the current driver was managed via
wireless extensions, but now the driver is managed by cfg80211. The
STA implementation of SIOCGIWAUTH should no longer be used, so remove
it.

Change-Id: I454f925ac3d11cf84d311285b74ecd3674ecb90f
CRs-Fixed: 2128360
diff --git a/core/hdd/src/wlan_hdd_wext.c b/core/hdd/src/wlan_hdd_wext.c
index b71bc01..bb657ad 100644
--- a/core/hdd/src/wlan_hdd_wext.c
+++ b/core/hdd/src/wlan_hdd_wext.c
@@ -12979,7 +12979,7 @@
 	(iw_handler) iw_set_genie,      /* SIOCSIWGENIE */
 	(iw_handler) iw_get_genie,      /* SIOCGIWGENIE */
 	(iw_handler) iw_set_auth,       /* SIOCSIWAUTH */
-	(iw_handler) iw_get_auth,       /* SIOCGIWAUTH */
+	(iw_handler) NULL,      /* SIOCGIWAUTH */
 	(iw_handler) NULL,      /* SIOCSIWENCODEEXT */
 	(iw_handler) NULL,      /* SIOCGIWENCODEEXT */
 	(iw_handler) NULL,      /* SIOCSIWPMKSA */