Plugin: Clear Cart for WooCommerce

cart.php

<input type="submit" class="button" name="clear-cart" value="<?php _e('Empty Cart', 'woocommerce'); ?>" />

functions.php

/**
 * Clear Cart for WooCommerce
 */
add_action( 'init', 'we_woocommerce_clear_cart_url' );
function we_woocommerce_clear_cart_url() {
	global $woocommerce;
	if( isset($_REQUEST['clear-cart']) ) {
		$woocommerce->cart->empty_cart();
	}
}