Elastica\Client::removeHeader PHP Method

    public function removeHeader($header)
    {
        if (is_string($header)) {
            if (array_key_exists($header, $this->_config['headers'])) {
                unset($this->_config['headers'][$header]);
            }
        } else {
            throw new InvalidException('Header must be a string');
        }
        return $this;
    }