Replace Decode's font with a Typekit font

functions.php

<?php

function decode_child_remove_font() {
	wp_dequeue_style( 'decode-font-stylesheet' );
}
add_action( 'wp_enqueue_scripts', 'decode_child_remove_font', 20 );

function decode_child_add_typekit() {
	echo '<script type="text/javascript" src="//use.typekit.net/XXXXXXX.js"></script>
	<script type="text/javascript">try{Typekit.load();}catch(e){}</script>';
}
add_filter( 'wp_head', 'decode_child_add_typekit' );