Remove unused CSS asset registration in FilamentServiceProvider (#2444)

Co-authored-by: Alex Justesen <1144087+alexjustesen@users.noreply.github.com>

app/Providers/FilamentServiceProvider.php

@@ -2,8 +2,6 @@
 
 namespace App\Providers;
 
-use Filament\Support\Assets\Css;
-use Filament\Support\Facades\FilamentAsset;
 use Filament\Support\Facades\FilamentView;
 use Filament\View\PanelsRenderHook;
 use Illuminate\Support\Facades\Blade;
@@ -24,10 +22,6 @@ class FilamentServiceProvider extends ServiceProvider
      */
     public function boot(): void
     {
-        FilamentAsset::register([
-            Css::make('panel', __DIR__.'/../../resources/css/panel.css'),
-        ]);
-
         FilamentView::registerRenderHook(
             PanelsRenderHook::GLOBAL_SEARCH_BEFORE,
             fn (): string => Blade::render("@livewire('topbar.run-speedtest-action')"),