Replace the 'x' in WooCommerce cart.php with text because 'x' is not helpfull at all for screenreader users. I give a extra class to the text so that it can be hidden with CSS for visual browsers, because I replace that link with Font Awesome icon using :before. See also: https://github.com/woothemes/woocommerce/issues/5725.

functions.php

// Replace the 'x' in WooCommerce cart.php with text because 'x' is not helpfull at all for screenreader users.
// https://gist.github.com/teledirigido/a859a1f0b954fc3f20cf44ef11d5718e/edit
function woocommerce_remove_item( $html, $cart_item_key ) {
	$cart_item_key = $cart_item_key;
	$html = sprintf( '<a href="%s" class="remove" title="%s"><span class="wsis-remove-item">%s</span></a>', 
		esc_url( wc_get_cart_remove_url( $cart_item_key ) ), 
		__( 'Remove', 'woocommerce' ), 
		__( 'Remove', 'woocommerce' ));
	return $html;
}

add_filter ( 'woocommerce_cart_item_remove_link', 'woocommerce_remove_item', 10, 2 );