There is no way to disable AddClassesToCachePass compiler pass.
It generates classes.map file, and then ClassCacheCacheWarmer always generated classes.php file.
So, if I do app/console cache:warmup for my dev environment I got a classes.php file always, wihtout exceptions. But I want to disable that, as it described in http://symfony.com/doc/current/cookbook/debugging.html (my IDE is not very happy with classes.php file)

The only one way to do that is to override buildContainer method in AppKernel.php file and remove line

$container->addCompilerPass(new AddClassesToCachePass($this));

There should be more convient way to do that.