Fix a bunch of phpstan issues.

app/Http/Controllers/Admin/HomeController.php

@@ -111,11 +111,9 @@ class HomeController extends Controller
     /**
      * Send a test message to the admin.
      *
-     * @param Request $request
-     *
      * @return RedirectResponse|Redirector
      */
-    public function testMessage(Request $request)
+    public function testMessage()
     {
         Log::channel('audit')->info('User sends test message.');
         /** @var User $user */

app/Http/Controllers/AttachmentController.php

@@ -209,14 +209,13 @@ class AttachmentController extends Controller
     /**
      * View attachment in browser.
      *
-     * @param Request    $request
      * @param Attachment $attachment
      *
      * @return LaravelResponse
      * @throws FireflyException
      * @throws BindingResolutionException
      */
-    public function view(Request $request, Attachment $attachment): LaravelResponse
+    public function view(Attachment $attachment): LaravelResponse
     {
         if ($this->repository->exists($attachment)) {
             $content = $this->repository->getContent($attachment);

app/Http/Controllers/Auth/LoginController.php

@@ -148,7 +148,7 @@ class LoginController extends Controller
      * @param Request $request
      *
      * @return void
-     *
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      * @throws ValidationException
      */
     protected function sendFailedLoginResponse(Request $request)