Move view logic into middleware

views/error/404.blade.php

@@ -2,7 +2,7 @@
 
 @section('content')
   <p>
-    {{ $translator->trans('core.views.error.404_message') }}
+    {{ $message }}
   </p>
   <p>
     <a href="{{ $app->url() }}">

views/error/default.blade.php

@@ -2,21 +2,6 @@
 
 @section('content')
   <p>
-    {{-- TODO: Change below to @php when Laravel is upgraded --}}
-    <?php
-      $getTranslationIfExists = function ($code) use ($translator, $settings) {
-          $key = 'core.views.error.'.$code.'_message';
-          $translation = $translator->trans($key, ['{forum}' => $settings->get('forum_title')]);
-
-          return $translation === $key ? false : $translation;
-      };
-
-      if (! $translation = $getTranslationIfExists($error->getCode())) {
-          if (! $translation = $getTranslationIfExists(500)) {
-              $translation = 'An error occurred while trying to load this page.';
-          }
-      }
-    ?>
-    {{ $translation }}
+    {{ $message }}
   </p>
 @endsection