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<!-- With the help of following snippet, you will be able to remove default author profile fields in WordPress. -->

add_filter('user_contactmethods','hide_profile_fields',10,1); 
function hide_profile_fields( $contactmethods ) {
  unset($contactmethods['aim']);
  unset($contactmethods['jabber']);
  unset($contactmethods['yim']);
  return $contactmethods;
}