title: How to remove 'clear all' button with CSS (ng-select field)
body: <p>How do I remove the "clear button" from a ng-select field with search?</p>
  
  <p><img src="https://i.stack.imgur.com/ukwqi.png" alt="">
  I'm using angular 6 with ng-select package:
  <a href="https://www.npmjs.com/package/@ng-select/ng-select" rel="noreferrer">https://www.npmjs.com/package/@ng-select/ng-select</a></p>