Make sure Attachment::show always return ResponseInterface (#590)

src/Api/Attachment.php

@@ -12,7 +12,6 @@ declare(strict_types=1);
 namespace Mailgun\Api;
 
 use Mailgun\Assert;
-use Mailgun\Model\Attachment\Attachment as Model;
 use Psr\Http\Message\ResponseInterface;
 
 /**
@@ -21,7 +20,7 @@ use Psr\Http\Message\ResponseInterface;
 class Attachment extends HttpApi
 {
     /**
-     * @return Model|ResponseInterface
+     * @return ResponseInterface
      */
     public function show(string $url)
     {
@@ -31,6 +30,10 @@ class Attachment extends HttpApi
 
         $response = $this->httpGet($url);
 
-        return $this->hydrateResponse($response, Model::class);
+        if (200 !== $response->getStatusCode()) {
+            $this->handleErrors($response);
+        }
+
+        return $response;
     }
 }

src/Model/Attachment/Attachment.php

@@ -1,39 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-/*
- * Copyright (C) 2013 Mailgun
- *
- * This software may be modified and distributed under the terms
- * of the MIT license. See the LICENSE file for details.
- */
-
-namespace Mailgun\Model\Attachment;
-
-use Mailgun\Model\ApiResponse;
-
-/**
- * @author Tobias Nyholm <tobias.nyholm@gmail.com>
- */
-final class Attachment implements ApiResponse
-{
-    private $data;
-
-    private function __construct()
-    {
-    }
-
-    public static function create(array $data): self
-    {
-        $new = new self();
-        $new->data = $data;
-
-        return $new;
-    }
-
-    public function getData(): array
-    {
-        return $this->data;
-    }
-}