chore(navbar): remove unused SCSS file and reference

frontend/src/app/shared/components/navbar/navbar.component.scss

@@ -1,34 +0,0 @@
-:host {
-  display: block;
-}
-
-.text-gold {
-  color: #FFD700;
-}
-
-.bg-gold {
-  background-color: #FFD700;
-  &:hover {
-    background-color: #FFC000;
-  }
-}
-
-.hover\:bg-gold-dark:hover {
-  background-color: #FFC000;
-}
-
-.hover\:text-gold:hover {
-  color: #FFD700;
-}
-
-nav {
-  position: fixed;
-  top: 0;
-  left: 0;
-  right: 0;
-  z-index: 1000;
-}
-
-.transition-colors {
-  transition: all 0.2s ease-in-out;
-} 

frontend/src/app/shared/components/navbar/navbar.component.ts

@@ -5,7 +5,6 @@ import { CommonModule } from '@angular/common';
 @Component({
   selector: 'app-navbar',
   templateUrl: './navbar.component.html',
-  styleUrls: ['./navbar.component.scss'],
   standalone: true,
   imports: [CommonModule, RouterModule]
 })