Remove bottom line in UINavigationBar

        self.navigationController?.navigationBar.translucent = false
        
        guard let subviews = self.navigationController?.navigationBar.subviews else { return }
        for parent in subviews {
            for childView in parent.subviews {
                if(childView is UIImageView) {
                    childView.removeFromSuperview()
                }
            }
        }