How to remove the zip code field from the checkout page? I have a Drupal 8 website with Drupal Commerce 2.x. I want to disable the zip code field in the checkout page. How can I do this?
Address modifications should be done on the Address module level, not on the Commerce level.

You can disable the zip code for a specific country by subscribing to the AddressFormatEvent and removing the %postalCode token from the $definition['format'] string. A str_replace('%postalCode', '', $definition['format']) should do it.

You can find an example event in this blog post.