Cache\Adapter\Filesystem\FilesystemCachePool::removeListItem PHP Method

    protected function removeListItem($name, $key)
    {
        $list = $this->getList($name);
        foreach ($list as $i => $item) {
            if ($item === $key) {
                unset($list[$i]);
            }
        }
        return $this->filesystem->update($this->getFilePath($name), serialize($list));
    }