fix(compose-multiplatform): remove unnecessary header

[buenaflor]

# Compose Multiplatform is unnecessary since the page already displays a header by default

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 25, 2025 11:17am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
develop-docs	⬜️ Ignored (Inspect)			Jul 25, 2025 11:17am

[codecov]

Bundle Report

Changes will increase total bundle size by 570 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-client-array-push	9.85MB	-6 bytes (-0.0%) ⬇️
sentry-docs-server-cjs	12.25MB	576 bytes (0.0%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.75MB	-0.0%
../instrumentation.js	-3 bytes	1.08MB	-0.0%
9523.js	-3 bytes	1.05MB	-0.0%
../app/[[...path]]/page.js.nft.json	195 bytes	728.08kB	0.03%
../app/platform-redirect/page.js.nft.json	195 bytes	727.99kB	0.03%
../app/sitemap.xml/route.js.nft.json	195 bytes	725.46kB	0.03%

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	879.71kB	-0.0%
static/chunks/1831-*.js	-3 bytes	422.23kB	-0.0%
server/middleware-*.js	5.55kB	6.55kB	555.3% ⚠️
server/middleware-*.js	-5.55kB	1.0kB	-84.74%
static/JFAsAg4exHcerPYzOZ9kq/_buildManifest.js (New)	684 bytes	684 bytes	100.0% 🚀
static/JFAsAg4exHcerPYzOZ9kq/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/bR6vuGEr0g-*.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️
static/bR6vuGEr0g-*.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️