Remove email and country fields from registration form

[Negin]

Hi everyone. I use WHMCS V8.12 and I want to customize my registration form. I want to keep only the phone number and password and remove the other fields.I have found out that I can make some fields optional and then remove the input field in the tpl and submit the form without any errors. But for the email and country, after a huge research I couldn't find anyway safe to remove them without any errors in the submission form or any bugs for the later updates of whmcs. I also couldn't find any plugin in the store to achieve this. Can anyone help me to solve this? I don't want to use the following, because it has some security issues:
 

<input type="hidden" name="email" id="inputEmail" class="d-none" value="N/A">
<input type="hidden" name="country" id="inputCountry" class="d-none" value="N/A">

 

[Azhar Patel]

Hello @Negin
Email is required filed and based on email only WHMCS consider each client as Unique