<?php

function remove_switch_link( $switch_link, $item_id, $item, $subscription ) {
	$product_to_check = 336;

  if( $subscription->has_product( $product_to_check ) ){
		return '';
	}
	return $switch_link;
}
add_filter( 'woocommerce_subscriptions_switch_link', 'remove_switch_link', 100, 4 );