greenhouse/diskcache/cache.go
func (c *Cache) Delete(key string) error {
	return os.Remove(c.KeyToPath(key))
}
func (c *Cache) Delete(key string) error {
	return os.Remove(c.KeyToPath(key))
}
func ( c * Cache ) Delete ( key string ) error { return os . Remove ( c . KeyToPath ( key ) ) }
// Delete deletes the file at key
Delete deletes the file at key