Do not show information of the plugin “Shipment Tracking” in invoice PDFs

remove_tracking_info_invoice_pdf.php

<?php
// Add this code to your theme functions.php file or a custom plugin
if ( class_exists( 'zorem_woocommerce_advanced_shipment_tracking' ) ) {	
	add_action( 'wp_wc_invoice_pdf_start_template', function() {
		$tracking_actions = $GLOBALS[ 'WC_advanced_Shipment_Tracking' ];
		remove_action( 'woocommerce_email_before_order_table', array( $tracking_actions, 'email_display' ), 0, 4 );
	});

	add_action( 'wp_wc_invoice_pdf_end_template', function() {
	        $tracking_actions = $GLOBALS[ 'WC_advanced_Shipment_Tracking' ];
		add_action( 'woocommerce_email_before_order_table', array( $tracking_actions, 'email_display' ), 0, 4 );
	});
}