title: how can I remove the top border on UIToolBar
body: <p>I have set my UIToolBar tint color to some value, and there is this border line that I see in which I want to remove:</p>
  
  <p><img src="https://i.stack.imgur.com/VsVdE.png" alt="enter image description here"></p>
  
  <p>How do I remove this black border></p>