feat(sw): remove no-logo case from SW Header Logo story

Viewer Logo story keeps its no-logo case. Viewer test expects 2 SW headers.

src/sw/sw-header.stories.tsx

@@ -441,10 +441,10 @@ export function ComposedDemo() {
 }
 
 // 2026-10-22 (user request): sidebar "Logo" (ID sw-header--logo-slot kept), page title "SW Header — 로고". Same cases,
-// order and layout as SW/Viewer › Logo: 로고 없음 → logoSrc → logo (element), each header fluid up to 1440px (no
+// order and layout as SW/Viewer › Logo: logoSrc → logo (element), each header fluid up to 1440px (no
 // scroller). The SW Header home click (callbacks.onHomeClick) is kept.
+// 2026-10-26 (user request): the "로고 없음" case is removed here only; SW/Viewer › Logo keeps it.
 const LOGO_CASES: { title: string; props: Partial<SWHeaderProps> }[] = [
-  { title: "로고 없음 (기본)", props: { logoSrc: undefined, logoAlt: undefined } },
   { title: "logoSrc (이미지 URL)", props: { logoSrc: placeholderLogo, logoAlt: "임시 로고" } },
   { title: "logo (요소)", props: { logo: <svg viewBox="0 0 32 17" width="32" height="17" aria-hidden="true"><rect x="0.5" y="0.5" width="31" height="16" rx="3" fill="none" stroke="#fff" /><text x="16" y="12.5" fill="#fff" fontSize="10" fontWeight="700" textAnchor="middle">LOGO</text></svg>, logoAlt: "예시 로고" } },
 ]