making the email field Optional

I went to comment.php in Appearance > Editor

then commented out these lines of php with /* */ I presume this is all as it works.

First instance::
<?php /* echo get_avatar($comment->comment_author_email, 82); */ ?>

Second Instance::
/* ’email’ => ‘<p class=”input-block”>
<label for=”comment_email” class=”required”>’ . __(“Email <span>(required):</span>”, kopa_get_domain()) . ‘</label>
<input type=”email” name=”email” id=”comment_email”
value=”‘ . esc_attr($commenter[‘comment_author_email’]) . ‘” >
</p>’, */