get route out of hello world

[NullVoxPopuli]

importing from @ember/routing/-internals is a bad time

this simple change removes Route from the hello-world demo

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NOTE: sideEffects: false also achieves the same goal: #21456

but we should ship this PR anyway

[github-actions]

📊 Size report

Tarball size — 1.2 MB → 1.2 MB

dist/dev   -0.01%↓

File	Before (Size / Brotli)	After (Size / Brotli)
./packages/shared-chunks/index-{hash}.js	78.5 kB / 19.1 kB	-0.17%↓78.4 kB / -0.2%↓19 kB
Total (Includes all files)	2.1 MB / 491.6 kB	-0.01%↓2.1 MB / -0.01%↓491.5 kB

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dist/prod   -0.01%↓

File	Before (Size / Brotli)	After (Size / Brotli)
./packages/shared-chunks/index-{hash}.js	66.5 kB / 16.3 kB	-0.21%↓66.4 kB / 0.01%↑16.3 kB
Total (Includes all files)	1.9 MB / 449.7 kB	-0.01%↓1.9 MB / -0%↓449.7 kB

---

smoke-tests/v2-app-hello-world-template/dist   -25.7%↓

File	Before (Size / Brotli)	After (Size / Brotli)
./assets/main-{hash}.js	234.9 kB / 64.3 kB	-25.7%↓174.5 kB / -25%↓48.3 kB
Total (Includes all files)	235.2 kB / 64.5 kB	-25.7%↓174.8 kB / -24.9%↓48.4 kB

_{🤖 This report was automatically generated by wyvox/pkg-size}

[mansona]

Looks good to me 👍