qcacld-3.0: Remove hdd_sme_open_session_callback() prototype

Function hdd_sme_open_session_callback() was removed by:
  qcacld-3.0: Send the vdev create to firmware in the caller thread
  Change-Id Iafb186b13d948e421d152c3142cb8614fdbbffa6

However, the prototype was not removed, so remove it now.

Change-Id: Iffa96f51b2e274ba3540dbeac3011819285f50a0
CRs-Fixed: 3428757

core/hdd/inc/wlan_hdd_main.h

@@ -3635,8 +3635,7 @@ static inline int wlan_hdd_nl_init(struct hdd_context *hdd_ctx)
 	return nl_srv_init(hdd_ctx->wiphy, proto);
 }
 #endif
-QDF_STATUS hdd_sme_open_session_callback(uint8_t vdev_id,
-					 QDF_STATUS qdf_status);
+
 QDF_STATUS hdd_sme_close_session_callback(uint8_t vdev_id);
 
 int hdd_register_cb(struct hdd_context *hdd_ctx);