Navigator: Fix RTL command lnd logic for missions

The navigator was sending RTL commands in the wrong circumstances leading to a cycle between Navigator and Commander.

src/modules/navigator/rtl.cpp

@@ -300,11 +300,6 @@ RTL::set_rtl_item()
 
 	reset_mission_item_reached();
 
-	/* execute command if set */
-	if (!item_contains_position(&_mission_item)) {
-		issue_command(&_mission_item);
-	}
-
 	/* convert mission item to current position setpoint and make it valid */
 	mission_item_to_position_setpoint(&_mission_item, &pos_sp_triplet->current);
 	pos_sp_triplet->next.valid = false;