Hi there,
About this issue, you need to use code and add into file functions.php ( child-theme):
add_filter( 'woocommerce_checkout_fields' , 'milano_remove_checkout_fields' );
function milano_remove_checkout_fields( $fields ) {
unset($fields['billing']['billing_state']);
return $fields;
}List field you can remove:
unset($fields['billing']['billing_first_name']);
unset($fields['billing']['billing_last_name']);
unset($fields['billing']['billing_company']);
unset($fields['billing']['billing_address_1']);
unset($fields['billing']['billing_address_2']);
unset($fields['billing']['billing_city']);
unset($fields['billing']['billing_postcode']);
unset($fields['billing']['billing_country']);
unset($fields['billing']['billing_state']);
unset($fields['billing']['billing_phone']);
unset($fields['order']['order_comments']);
unset($fields['billing']['billing_email']);
unset($fields['account']['account_username']);
unset($fields['account']['account_password']);
unset($fields['account']['account_password-2']);