I found out how to do this. In my case, I wanted to get rid of the category indicator too. I edited the Main Index Template (index.php). Find this code:
<?php printf( __( 'Categories: %s', 'notesil' ), get_the_category_list( ', ' ) ); ?></span>
<span class="meta-sep">|</span>
<span class="comments-link"><?php comments_popup_link( __( 'Post a comment', 'notesil' ), __( 'Comments (1)', 'notesil' ), __( 'Comments (%)', 'notesil' ) ); ?></span>
Wrap this snippet in HTML comments, like this:
<!--
<?php printf( __( 'Categories: %s', 'notesil' ), get_the_category_list( ', ' ) ); ?></span>
<span class="meta-sep">|</span>
<span class="comments-link"><?php comments_popup_link( __( 'Post a comment', 'notesil' ), __( 'Comments (1)', 'notesil' ), __( 'Comments (%)', 'notesil' ) ); ?></span>
-->
