Disabling preloader

Now it is impossible to do with theme options. We can propose this way:
Go to menu Appearance=>Editor find file part-preloader.php and replace all the code you see with this one

<!--<div id="theme-preloader" class="play">
    <div class="preloader-logo section-dark">
        <?php get_template_part("part-logo"); ?>
    </div>
    <div class="preloader-line">
        <div class="preloader-line-progress"></div>
    </div>
</div>-->