Tidy Up WordPress TinyMCE 4 editor buttons

gistfile1.php

<?php

// Modify Tiny_MCE init
add_filter('tiny_mce_before_init', 'tmy_modify_tinyMCE4', 10, 2 );

/**
 * Filter TinyMCE4 Init args.
 */
function tmy_modify_tinyMCE4( $mceInit, $editor_id ) {

	// Block Formats.
	// Set custom to prevent authors using H1 tags in the content.
	$mceInit['block_formats'] = "Paragraph=p;Header 2=h2;Header 3=h3;Preformatted=pre";

	$toolbar1 = explode( ',', $mceInit['toolbar1'] );
	$toolbar2 = explode( ',', $mceInit['toolbar2'] );

	$remove = array(
		'underline',
		'forecolor',
		'alignjustify',
		'alignleft',
		'aligncenter',
		'alignright',
		'indent',
		'outdent',
		'wp_fullscreen',
		'wp_more',
		'hr',
		'strikethrough'
	);

	foreach ( $remove as $name ) {

		if ( $key = array_search( $name, $toolbar1 ) ) {
			unset( $toolbar1[$key] );
		}

		if ( $key = array_search( $name, $toolbar2 ) ) {
			unset( $toolbar2[$key] );
		}

	}
	
	// Add some back in, but to different locations.
	array_splice( $toolbar2, 1, 0, 'hr' );
	array_splice( $toolbar2, 1, 0, 'strikethrough' );

	$mceInit['toolbar1'] = implode( ',', $toolbar1 );
	$mceInit['toolbar2'] = implode( ',', $toolbar2 );

	return $mceInit;
}