I am using Ajax Register extension for registration of new member. it has following fields:

Name
Username
Email
Password
confirm Password
captcha

I have now updated easydiscuss and now the registration form shows the following extra fields from easydiscuss:

Nickname
Description
Signature
Facebook
Twitter
Linkedin
Skype
Website
Location

When I rightclick my mouse on these extra fields, it shows the following code:

<input type="text" name="jform[easydiscussprofile][nickname]" id="jform_easydiscussprofile_nickname" value="" size="30" autocomplete="off">

How can I hide these extra fields from the Registration form?