Sorry, small code fix - this should work:
function adjust_my_breadcrumbs( $linksarray ) {
$last = count( $linksarray );
if( ( is_array( $linksarray ) && $last > 0 ) && isset( $linksarray[$last-1]['id'] ) ) {
array_pop( $linksarray );
}
return $linksarray;
}
add_filter( 'wpseo_breadcrumb_links', 'adjust_my_breadcrumbs' );