Remove Dropbox Provider

This will be moved to its own package

src/Provider/Dropbox.php

@@ -1,43 +0,0 @@
-<?php
-
-namespace League\OAuth2\Client\Provider;
-
-use League\OAuth2\Client\Entity\User;
-
-class Dropbox extends AbstractProvider
-{
-
-    public function urlAuthorize()
-    {
-        return 'https://www.dropbox.com/1/oauth2/authorize';
-    }
-
-    public function urlAccessToken()
-    {
-        return 'https://api.dropbox.com/1/oauth2/token';
-    }
-
-    public function urlUserDetails(\League\OAuth2\Client\Token\AccessToken $token)
-    {
-        return 'https://api.dropbox.com/1/account/info?access_token='.$token;
-    }
-
-    public function userDetails($response, \League\OAuth2\Client\Token\AccessToken $token)
-    {
-        $user = new User;
-
-        $user->uid = $response->uid;
-        $user->name = $response->display_name;
-        $user->email = $response->email;
-
-        return $user;
-    }
-
-    public function getAuthorizationUrl($options = array())
-    {
-        return parent::getAuthorizationUrl(array_merge([
-            'approval_prompt' => []
-        ], $options));
-    }
-
-}

test/src/Provider/DropboxTest.php

@@ -1,50 +0,0 @@
-<?php
-
-namespace League\OAuth2\Client\Test\Provider;
-
-use Mockery as m;
-
-class DropboxTest extends \PHPUnit_Framework_TestCase
-{
-    protected $provider;
-
-    protected function setUp()
-    {
-        $this->provider = new \League\OAuth2\Client\Provider\Dropbox([
-            'clientId' => 'mock_client_id',
-            'clientSecret' => 'mock_secret',
-            'redirectUri' => 'none',
-        ]);
-    }
-
-    public function tearDown()
-    {
-        m::close();
-        parent::tearDown();
-    }
-
-    public function testAuthorizationUrl()
-    {
-        $url = $this->provider->getAuthorizationUrl([
-            'approval_prompt' => []
-        ]);
-        $uri = parse_url($url);
-        parse_str($uri['query'], $query);
-
-        $this->assertArrayHasKey('client_id', $query);
-        $this->assertArrayHasKey('redirect_uri', $query);
-        $this->assertArrayHasKey('state', $query);
-        $this->assertArrayHasKey('scope', $query);
-        $this->assertArrayHasKey('response_type', $query);
-        $this->assertArrayNotHasKey('approval_prompt', $query);
-        $this->assertNotNull($this->provider->state);
-    }
-
-    public function testUrlAccessToken()
-    {
-        $url = $this->provider->urlAccessToken();
-        $uri = parse_url($url);
-
-        $this->assertEquals('/1/oauth2/token', $uri['path']);
-    }
-}