Disabling Premade Layouts Tab - kary4/divituts GitHub Wiki
Please add the following code to the functions.php file in your child theme folder:
add_action('admin_head', 'disable_premade');
function disable_premade() {
echo '<style>
li.et-fb-settings-options_tab_modules_all.et-fb-settings-tabs-nav-item:first-child {
display: none !important;
}
ul.et-pb-options-tabs-links.et-pb-saved-modules-switcher li.et-pb-new-module {
display: none !important;
}
</style>';
}