Move Gravatar to external plugin

app/User/Avatar/GravatarProvider.php

@@ -1,42 +0,0 @@
-<?php
-
-namespace Kanboard\User\Avatar;
-
-use Kanboard\Core\Base;
-use Kanboard\Core\User\Avatar\AvatarProviderInterface;
-
-/**
- * Gravatar Avatar Provider
- *
- * @package  avatar
- * @author   Frederic Guillot
- */
-class GravatarProvider extends Base implements AvatarProviderInterface
-{
-    /**
-     * Render avatar html
-     *
-     * @access public
-     * @param  array $user
-     * @param  int   $size
-     * @return string
-     */
-    public function render(array $user, $size)
-    {
-        $url = sprintf('https://www.gravatar.com/avatar/%s?s=%d', md5(strtolower($user['email'])), $size);
-        $title = $this->helper->text->e($user['name'] ?: $user['username']);
-        return '<img src="'.$url.'" alt="'.$title.'" title="'.$title.'">';
-    }
-
-    /**
-     * Determine if the provider is active
-     *
-     * @access public
-     * @param  array $user
-     * @return boolean
-     */
-    public function isActive(array $user)
-    {
-        return !empty($user['email']) && $this->configModel->get('integration_gravatar') == 1;
-    }
-}