qcacld-3.0: Cleanup ROAM_TARGET_IF_CONVERGENCE usage

wma to target_if convergence code is guarded under the feature
flag ROAM_TARGET_IF_CONVERGENCE and it's is enabled currently.
Remove the flag usage and remove the deprecated code(else part)
also.

Change-Id: I6973d9c366ec6a9c6164dd19f6f4775dd3ebf5f0
CRs-Fixed: 3049942

components/mlme/core/src/wlan_mlme_vdev_mgr_interface.c

@@ -303,13 +303,8 @@ QDF_STATUS sta_mlme_vdev_notify_roam_start(struct vdev_mlme_obj *vdev_mlme,
 {
 	mlme_legacy_debug("vdev id = %d ",
 			  vdev_mlme->vdev->vdev_objmgr.vdev_id);
-#ifdef ROAM_TARGET_IF_CONVERGENCE
 	return wlan_cm_sta_mlme_vdev_roam_notify(vdev_mlme, event_data_len,
 						 event_data);
-#else
-	return wma_sta_mlme_vdev_roam_notify(vdev_mlme, event_data_len,
-					     event_data);
-#endif
 }
 
 /**