src/Client.php
public function deletePingback($uri)
    {
        $response = $this
            ->getHttpClient()
            ->request('GET', "/res.php?key={$this->apiKey}&action=del_pingback&addr={$uri}");

        $responseText = $response->getBody()->__toString();

        if ($responseText === self::STATUS_OK) {
            return true;
        }
        throw new ErrorResponseException(
            $this->getErrorMessage($responseText) ?: $responseText,
            $this->getErrorCode($responseText) ?: 0
        );
    }
public function deletePingback($uri)
    {
        $response = $this
            ->getHttpClient()
            ->request('GET', "/res.php?key={$this->apiKey}&action=del_pingback&addr={$uri}");

        $responseText = $response->getBody()->__toString();

        if ($responseText === self::STATUS_OK) {
            return true;
        }
        throw new ErrorResponseException(
            $this->getErrorMessage($responseText) ?: $responseText,
            $this->getErrorCode($responseText) ?: 0
        );
    }
Remove pingback url from whitelist.

@param string $uri
@return bool
@throws ErrorResponseException
@throws \GuzzleHttp\Exception\GuzzleException