I need to remove some states/regions from the checkout dropdown in the billing step, and different states/regions from the shipping step on Magento 2.2.
I have used this
[How to remove Guam, Palau, and other US Territories from address State dropdown - Magento 2](https://magento.stackexchange.com/questions/137284/how-to-remove-guam-palau-and-other-us-territories-from-address-state-dropdown?rq=1)

it works but it removes them from both shipping and billing.