firebase.go
func (c *Client) Remove(path string, params map[string]string) error {
	_, err := c.api.Call("DELETE", c.Url+"/"+path, c.Auth, nil, params)

	return err
}
func (c *Client) Remove(path string, params map[string]string) error {
	_, err := c.api.Call("DELETE", c.Url+"/"+path, c.Auth, nil, params)

	return err
}
// Remove deletes the data at the given path.