This removes the SearchWP callback from 'add_meta_boxes' when viewing only the Event Espresso admin pages. SearchWP has a type declation of string on $post_type, on the EE admin pages it is null.

tw_ee_remove_searchwp_from_gen_settings.php

<?php //Please do not include the opening PHP tag if you already have one.

add_action('AHEE__EE_Admin_Page___display_admin_page__modify_metaboxes', 'tw_ee_remove_searchwp_from_ee_admin_pages', 10);
function tw_ee_remove_searchwp_from_ee_admin_pages() {
    if(class_exists('SearchWP')) {
        $searchwp = new SearchWP();
        $searchwp_sources = $searchwp->get_sources();
        if(!empty($searchwp_sources['post.attachment'])) {
            remove_action('add_meta_boxes', array($searchwp_sources['post.attachment'], 'document_content_meta_box'), 10);
        }
    }
}