Add and remove fields from user profile

user_profile_custom_fields.php

// Add and remove fields from user profile
add_filter('user_contactmethods', 'modify_top_contact_methods', 0);
function modify_top_contact_methods($profile_fields) {

	// Remove old fields
	unset($profile_fields['aim']);
	unset($profile_fields['yim']);
	unset($profile_fields['jabber']);

	// Add new fields
	$profile_fields['website_name'] = 'Website/Blog Name';
/* 	$profile_fields['user_url'] = 'Website/Blog URL'; */
	$profile_fields['twitter'] = 'Twitter Username (without @)';
	$profile_fields['facebook'] = 'Facebook URL';
	$profile_fields['pinterest'] = 'Pinterest URL';
	$profile_fields['linkedin'] = 'LinkedIn URL';
	$profile_fields['instagram'] = 'Instagram Username';
/* 	$profile_fields['gplus'] = 'Google+ URL'; */

	// To retrieve $twitter = get_the_author_meta('twitter');

	return $profile_fields;
}