src/Ko/Semaphore.php
public function remove()
    {
        if (is_resource($this->mutex)) {
            sem_remove($this->mutex);
        }

        if (file_exists($this->file)) {
            unlink($this->file);
        }
    }
public function remove()
    {
        if (is_resource($this->mutex)) {
            sem_remove($this->mutex);
        }

        if (file_exists($this->file)) {
            unlink($this->file);
        }
    }
Remove semaphore.