Remove search field for Theme "Divi" (too close to other links: Pagespeed Insights).

functions.php

<?php
/**
 * Remove search field for Theme "Divi" (to close to other links: Pagespeed Insights).
 * Requires the Autoptimze option "Minimize HTML" to be activated.
 */
add_filter( 'autoptimize_html_after_minify', 'divi_remove_search' );
function divi_remove_search( $content ) {

	$content = preg_replace(
		'/\<div class="et_search.*close_search_field"\>\<\/span\>\<\/div\>\<\/div\>/',
		'',
		$content
	);

	return $content;
}