How to remove the text "item" in woocommerce mini cart?

Below is the code in woocommerce functions.php
I want to remove the text “item” without modify the origin file.

if ( ! function_exists( 'woocommerce_header_add_to_cart_fragment' ) ) {
	function woocommerce_header_add_to_cart_fragment( $fragments ) {
		global $woocommerce;
		$settings = array( 'header_cart_link' => 'false', 'nav_rss' => 'false', 'header_cart_total' => 'false' );
		$settings = woo_get_dynamic_values( $settings );
		ob_start();
	?>
		<a class="cart-contents" href="<?php echo esc_url( $woocommerce->cart->get_cart_url() ); ?>" title="<?php _e('View your shopping cart', 'woothemes'); ?>">
			<?php if ( $settings['header_cart_total'] == 'true' ) { echo sprintf(_n('<span class="count">%d</span> item', '<span class="count">%d</span> items', $woocommerce->cart->get_cart_contents_count(), 'woothemes'), $woocommerce->cart->get_cart_contents_count() );?> - <?php echo $woocommerce->cart->get_cart_subtotal(); } ?>
		</a>
	<?php

		$fragments['a.cart-contents'] = ob_get_clean();

		return $fragments;
	} // End woocommerce_header_add_to_cart_fragment()
}