Remove duplicated code

src/mod/endpoints/mod_loopback/mod_loopback.c

@@ -488,7 +488,6 @@ static switch_status_t channel_on_destroy(switch_core_session_t *session)
 {
 	switch_channel_t *channel = NULL;
 	loopback_private_t *tech_pvt = NULL;
-	void *pop;
 	switch_event_t *vars;
 
 	channel = switch_core_session_get_channel(session);
@@ -516,10 +515,7 @@ static switch_status_t channel_on_destroy(switch_core_session_t *session)
 			switch_frame_free(&tech_pvt->write_frame);
 		}
 
-		while (switch_queue_trypop(tech_pvt->frame_queue, &pop) == SWITCH_STATUS_SUCCESS && pop) {
-			switch_frame_t *frame = (switch_frame_t *) pop;
-			switch_frame_free(&frame);
-		}
+		clear_queue(tech_pvt);
 	}