fix(spa): remove duplicated player shell controller fields

frontend/angular/src/app/features/player/player-shell.component.ts

@@ -77,9 +77,6 @@ export class PlayerShellComponent {
   private readonly sessionContextStore = createSessionContextStore();
   private readonly controller = createVerticalSliceController(createApiClient(), this.sessionContextStore);
 
-  private readonly sessionContextStore = createSessionContextStore();
-  private readonly controller = createVerticalSliceController(createApiClient(), this.sessionContextStore);
-
   private normalizeCode(value: string): string {
     return value.trim().toUpperCase();
   }