disable web middleware for specific routes in laravel 5.2

I want to guest users have access to home page but in built in authentication process laravel redirects to login page. how can i give guest users access to home page?

my routes.php:

Route::group(['middleware' => 'web'], function () {
Route::auth();

Route::get('/', 'HomeController@index');

Route::get('/insert', 'HomeController@insertform');
Route::get('/job/{id}', 'JobsController@show');

Route::get('/city/{city}', 'JobsController@city');

Route::post('/insert', 'HomeController@insert');
Route::get('/cityinsert', 'HomeController@cityinsert');
Route::post('/cityinsert', 'HomeController@cityinsertpost');

});

and authenticate.php

class Authenticate
{
 /**
 * Handle an incoming request.
 *
 * @param  IlluminateHttpRequest  $request
 * @param  Closure  $next
 * @param  string|null  $guard
 * @return mixed
 */
public function handle($request, Closure $next, $guard = null)
{
    if (Auth::guard($guard)->guest()) {
        if ($request->ajax()) {
            return response('Unauthorized.', 401);
        } else {
            return redirect()->guest('login');
        }
    }

    return $next($request);
}
}

and this is my kernel.php

class Kernel extends HttpKernel
{
/**
 * The application's global HTTP middleware stack.
 *
 * These middleware are run during every request to your application.
 *
 * @var array
 */
protected $middleware = [
    IlluminateFoundationHttpMiddlewareCheckForMaintenanceMode::class,
];

/**
 * The application's route middleware groups.
 *
 * @var array
 */
protected $middlewareGroups = [
    'web' => [
        AppHttpMiddlewareEncryptCookies::class,
        IlluminateCookieMiddlewareAddQueuedCookiesToResponse::class,
        IlluminateSessionMiddlewareStartSession::class,
        IlluminateViewMiddlewareShareErrorsFromSession::class,
        AppHttpMiddlewareVerifyCsrfToken::class,
    ],

    'api' => [
        'throttle:60,1',
    ],
];

/**
 * The application's route middleware.
 *
 * These middleware may be assigned to groups or used individually.
 *
 * @var array
 */
protected $routeMiddleware = [
    'auth' => AppHttpMiddlewareAuthenticate::class,
    'auth.basic' => IlluminateAuthMiddlewareAuthenticateWithBasicAuth::class,
    'guest' => AppHttpMiddlewareRedirectIfAuthenticated::class,
    'throttle' => IlluminateRoutingMiddlewareThrottleRequests::class,
];
}

Answer

Remove the middleware from HomeController construct:

class HomeController extends Controller
{
    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        //$this->middleware('auth');
    }
}