code: public function removeNumber(int $id, string $number): ?array
      {
          $response = Request::delete($this->baseUrl.sprintf('contact/%d/phone-number/%s', $id, $number));
  
          if ($response->code != 200) {
              if (!empty($response->body->message)) {
                  Log::error($response->body->message);
              }
          }
  
          return [
              'code'    => $response->code,
              'message' => ($response->code == 200) ? 'OK' : $response->body->message ?? '',
              'data'    => $response->body,
          ];
      }
docs: Remove number from existing contact.
  
  @param int    $id
  @param string $number
  
  @return array|null