Flux checkout - disable address fields for local pickup shipping method.

functions.php

<?php
/**
 * Flux checkout - disable address fields for local pickup shipping method.
 *
 * @return void
 */
function flux_disable_fields_for_local_pickup() {
	$wc_ajax = filter_input( INPUT_GET, 'wc-ajax' );

	if ( ! Iconic_Flux_Core::is_checkout( true ) && 'checkout' !== $wc_ajax ) {
		return;
	}

	$chosen_methods = WC()->session->get( 'chosen_shipping_methods' );
	if ( empty( $chosen_methods[0] ) ) {
		return;
	}

	if ( false === strpos( $chosen_methods[0], 'local_pickup' ) ) {
		return;
	}

	// Remove address step.
	add_filter(
		'flux_custom_steps',
		function( $steps ) {
			unset( $steps[1] );

			return array_values( $steps );
		}
	);

	// Move state, postcode and country to details step.
	add_filter(
		'flux_checkout_details_fields',
		function( $details_fields ) {
			return array_merge( $details_fields, array( 'billing_state', 'billing_postcode', 'billing_country' ) );
		}
	);

	// Remove fields.
	add_filter(
		'woocommerce_checkout_fields',
		function( $fields ) {
			unset( $fields['billing']['billing_street_number'] );
			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_phone'] );
			unset( $fields['order']['order_comments'] );

			return $fields;
		},
		101
	);
}
add_action( 'init', 'flux_disable_fields_for_local_pickup' );