Utilize Authentication Middleware Contract (#5181)

* adjust auth middleware to point to contract

* remove middleware priority

app/Http/Kernel.php

@@ -51,7 +51,7 @@ class Kernel extends HttpKernel
      * @var array
      */
     protected $routeMiddleware = [
-        'auth' => \App\Http\Middleware\Authenticate::class,
+        'auth' => \Illuminate\Contracts\Auth\Middleware\AuthenticatesRequests::class,
         'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
         'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
         'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,
@@ -62,21 +62,4 @@ class Kernel extends HttpKernel
         'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
         'verified' => \Illuminate\Auth\Middleware\EnsureEmailIsVerified::class,
     ];
-
-    /**
-     * The priority-sorted list of middleware.
-     *
-     * This forces non-global middleware to always be in the given order.
-     *
-     * @var array
-     */
-    protected $middlewarePriority = [
-        \Illuminate\Session\Middleware\StartSession::class,
-        \Illuminate\View\Middleware\ShareErrorsFromSession::class,
-        \App\Http\Middleware\Authenticate::class,
-        \Illuminate\Routing\Middleware\ThrottleRequests::class,
-        \Illuminate\Session\Middleware\AuthenticateSession::class,
-        \Illuminate\Routing\Middleware\SubstituteBindings::class,
-        \Illuminate\Auth\Middleware\Authorize::class,
-    ];
 }