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/**
 * Limit the product types that can be added to the store
 */
add_filter( 'product_type_selector', 'mw_custom_product_type_change', 20 );
function mw_custom_product_type_change( $product_types ) {
    $new_array = array(
        'subscription' => $product_types['subscription'] ,
        'variable-subscription' => $product_types['variable-subscription'] ,
        );
    // $product_types = $new_array + $product_types;
    $product_types = $new_array;
    return $product_types;
}