Fixes unused property database

src/InfluxDB/Adapter/GuzzleAdapter.php

@@ -1,17 +1,13 @@
 <?php
-
 namespace InfluxDB\Adapter;
 
 use GuzzleHttp\Client;
 use InfluxDB\Options;
-use InfluxDb\Adapter\QueryableInterface;
-use InfluxDB\Adapter\AdapterInterface;
 
 class GuzzleAdapter implements AdapterInterface, QueryableInterface
 {
     private $httpClient;
     private $options;
-    private $database;
 
     public function __construct(Client $httpClient, Options $options)
     {