Magento 2.1.2, Remove "region" from the Address

If you want disable Region from the address, you have to set below option like.

State is Required for : remove all selected country from here.

Allow to Choose State if It is Optional for Country : Set it as "No"

You can also remove it from "add new address" in customer account.

Copy file form vendor/magento/module-customer/view/frontend/templates/address/edit.phtml

add it in your theme. You can remove region from here for customer add new address.

Save configuration, remove var folder.