HHVM does not throw warnings on failed `unlink` - using return values instead
HHVM does not throw warnings on failed `unlink` - using return values instead

pensiero/AssetManager,hummer2k/AssetManager,wshafer/AssetManager,RWOverdijk/AssetManager,pensiero/AssetManager,wshafer/AssetManager,RWOverdijk/AssetManager,hummer2k/AssetManager,chaos0815/AssetManager,chaos0815/AssetManager