Change order of bootstrapping

See commit on flarum/flarum for explanation

src/Support/ServiceProvider.php

@@ -1,22 +1,9 @@
 <?php namespace Flarum\Support;
 
-use Flarum\Extend\ExtenderInterface;
 use Illuminate\Support\ServiceProvider as IlluminateServiceProvider;
-use Illuminate\Contracts\Events\Dispatcher;
-use InvalidArgumentException;
 
 class ServiceProvider extends IlluminateServiceProvider
 {
-    /**
-     * Bootstrap the application events.
-     *
-     * @return void
-     */
-    public function boot()
-    {
-        $this->extend($this->extenders());
-    }
-
     /**
      * Register the service provider.
      *
@@ -25,32 +12,4 @@ class ServiceProvider extends IlluminateServiceProvider
     public function register()
     {
     }
-
-    /**
-     * @return ExtenderInterface[]
-     */
-    public function extenders()
-    {
-        return [];
-    }
-
-    /**
-     * @param ExtenderInterface|ExtenderInterface[] $extenders
-     * @return void
-     */
-    protected function extend($extenders)
-    {
-        if (! is_array($extenders)) {
-            $extenders = [$extenders];
-        }
-
-        foreach ($extenders as $extender) {
-            if (! $extender instanceof ExtenderInterface) {
-                throw new InvalidArgumentException('Argument must be an object of type '
-                    . ExtenderInterface::class);
-            }
-
-            $extender->extend($this->app);
-        }
-    }
 }