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function _xe_remove_editor() {

    remove_post_type_support( 'portfolios', 'editor' );
    remove_post_type_support( 'testimonials', 'editor' );
    remove_post_type_support( 'tables', 'editor' );
    remove_post_type_support( 'clients', 'editor' );

}
add_action( 'add_meta_boxes', '_xe_remove_editor' );