Hide ticket fields in web widget

Hi,

I would like to hide the email field in the web widget. I found this post: https://support.zendesk.com/hc/en-us/community/posts/360029388034-Hide-some-fields-from-the-widget- 

It redirects you to this post: https://support.zendesk.com/hc/en-us/community/posts/360004395348-Hiding-system-fields-in-Web-Widget  

Which I am not authorised to view. Can someone either help me with the js code, or give my access to view that post? 

Thank you,

Amy

**Added 9th June: Feature Request (https://support.zendesk.com/hc/en-us/community/posts/360046753854-Feature-Request-Hide-ticket-fields-in-web-widget)**