WooCommerce: Disable PostCode/Zip Field on the Checkout Page

In some countries there is no Postcode/ZIP (such as Ireland!). How do we make the Postcode/ZIP field not required, or how do we completely remove it? The answer is very simple. PHP Snippet: Remove Postcode/ZIP Field @ WooCommerce Checkout Official Documentation https://docs.woothemes.com/document/tutorial-customising-checkout-fields-using-actions-and-filters/