Remove EXP_PUE flag, post editing is always enabled

Remove the 'pue' entry from config/exp.php and the abort_if guard
in StatusEditController. Post editing is now unconditionally available.

app/Http/Controllers/StatusEditController.php

@@ -16,7 +16,6 @@ class StatusEditController extends Controller
     public function __construct()
     {
         $this->middleware('auth');
-        abort_if(! config('exp.pue'), 404, 'Post editing is not enabled on this server.');
     }
 
     public function store(StoreStatusEditRequest $request, $id)

config/exp.php

@@ -39,8 +39,5 @@ return [
 	// HLS Live Streaming
 	'hls' => env('HLS_LIVE', false),
 
-	// Post Update/Edits
-	'pue' => env('EXP_PUE', true),
-
 	'autolink' => env('EXP_AUTOLINK_V2', false),
 ];