Remove unused formats in WordPress Editor TinyMCE

tp-tinymce-remove-unused-formats.php

<?php
/*
 * Modify TinyMCE editor to remove H1.
 */
add_filter('tiny_mce_before_init', 'tp_tinymce_remove_unused_formats' );
function tp_tinymce_remove_unused_formats($init)
{
  // Add block format elements you want to show in dropdown
	// $init['block_formats'] = 'Paragraph=p;Address=address;Pre=pre;Heading 1=h1;Heading 2=h2;Heading 3=h3;Heading 4=h4;Heading 5=h5;Heading 6=h6';
	$init['block_formats'] = 'Paragraph=p;Pre=pre;Heading 2=h2;Heading 3=h3;Heading 4=h4;Heading 5=h5;Heading 6=h6';
	return $init;
}