chore(contacts): remove the portal controllers retaining legacy attribution

app/Domains/Contacts/Http/Controllers/CustomerPortal/DashboardController.php

@@ -1,28 +0,0 @@
-<?php
-
-namespace App\Domains\Contacts\Http\Controllers\CustomerPortal;
-
-use App\Domains\Contacts\Contracts\CustomerPortalDashboardProvider;
-use App\Platform\Http\Controller;
-use Illuminate\Http\Request;
-use Illuminate\Http\Response;
-use Illuminate\Support\Facades\Auth;
-
-class DashboardController extends Controller
-{
-    public function __construct(
-        private readonly CustomerPortalDashboardProvider $customerPortalDashboardProvider,
-    ) {}
-
-    /**
-     * Answer with the portal dashboard figures for the signed-in contact.
-     *
-     * @return Response
-     */
-    public function __invoke(Request $request)
-    {
-        return response()->json(
-            $this->customerPortalDashboardProvider->get(Auth::guard('customer')->user())
-        );
-    }
-}