Use Laravel's database config.

src/Flarum/Core/CoreServiceProvider.php

@@ -22,8 +22,6 @@ class CoreServiceProvider extends ServiceProvider
     {
         $this->package('flarum/core', 'flarum');
 
-        Config::set('database.connections.flarum', Config::get('flarum::database'));
-
         $this->app->make('validator')->extend('username', 'Flarum\Core\Users\UsernameValidator@validate');
 
         Event::listen('Flarum.Core.*', 'Flarum\Core\Listeners\DiscussionMetadataUpdater');

src/Flarum/Core/Entity.php

@@ -26,11 +26,6 @@ class Entity extends Eloquent
         $this->validator = $validator ?: \App::make('validator');
     }
 
-    public function getConnection()
-    {
-        return static::resolveConnection('flarum');
-    }
-
     public function valid()
     {
         return $this->getValidator()->passes();

src/config/config.php

@@ -4,16 +4,6 @@ return array(
 
 	'installed' => true,
 	'title' => 'Flarum Prototype Forum',
-	'database' => array(
-		'driver'    => 'mysql',
-		'host'      => 'localhost',
-		'database'  => 'flarum',
-		'username'  => '',
-		'password'  => '',
-		'charset'   => 'utf8',
-		'collation' => 'utf8_unicode_ci',
-		'prefix'    => '',
-	),
 
 	'route_rules' => array(
         // 'prefix' => 'blog',