fix(i18n): remove unused tEditor and index variables

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/video-editor/SettingsPanel.tsx

@@ -187,7 +187,6 @@ export function SettingsPanel({
   onSpeedDelete,
 }: SettingsPanelProps) {
   const tSettings = useScopedT('settings');
-  const tEditor = useScopedT('editor');
   const { t } = useI18n();
   const [wallpaperPreviewPaths, setWallpaperPreviewPaths] = useState<string[]>([]);
   const [customImages, setCustomImages] = useState<string[]>([]);