Removes the current page title from Yoast breadcrumbs

strip_title_from_breadcrumb_output.php

function strip_title_from_breadcrumb_output( $output ){
	$output = str_replace( get_the_title(), '', $output );
	return $output;
}

add_filter( 'wpseo_breadcrumb_output', 'strip_title_from_breadcrumb_output' );