Modify TinyMCE editor to remove H1

modify-tinymce-editor-to-remove-h1.php

<?php
// Do NOT include the opening php tag above

add_filter('tiny_mce_before_init', 'tiny_mce_remove_unused_formats' );
/*
 * Modify TinyMCE editor to remove H1.
 */
function tiny_mce_remove_unused_formats($init) {
	// Add block format elements you want to show in dropdown
	$init['block_formats'] = 'Paragraph=p;Heading 2=h2;Heading 3=h3;Heading 4=h4;Heading 5=h5;Heading 6=h6;Address=address;Pre=pre';
	return $init;
}

This is exactly what I needed. Thank you!