Please tell me. How to fix error reviewer send me?

Envato Authors CodeCanyon
1

I have 2 errors of reviewer. Looking forward to the advice of everyone:
2. Should this really need nopriv? https://envato.d.pr/fl8F8q

  1. Don’t add extensions to handles: https://envato.d.pr/kA9Eif

2: I use ajax to delete user. image full code: http://prntscr.com/w8bbig
3.I do not understand where is wrong: image full code:http://prntscr.com/w8ben5
Thank you!