title: How to remove search box in ng-select
body: <p>My Angular 5 app needs to remove search box and clear x icon from ng-select.</p>
  
  <pre><code>&lt;ng-select [(ngModel)]="model" (change)="onChange($event)"&gt;
      &lt;section *ngFor="let x of userList;"&gt;
          &lt;ng-option value="{{x.id}}"&gt;
                {{ x.name }}
          &lt;/ng-option&gt;
      &lt;/section&gt;
  &lt;/ng-select&gt;
  </code></pre>
  
  <p>Thanks.</p>