Delete Gravity Forms Notification Scheduler notifications after submission of a second form

delete_notification_after_submission.php

<?php

add_action( 'gform_after_submission_18', function( $entry ){

	$first_entry = GFAPI::get_entry( rgar( $entry, 3 ) );
	
	gp_notification_scheduler()->delete_notification_queue( array(), $first_entry );

});