chore(integration): remove _helpers & fallback #16859

Job	Run time
Determine jobs to run	26s
Build Turborepo (ubuntu, self-hosted, linux, x64, metal)	1m 22s
Turborepo Examples	10m 38s
JS Package Tests	0s
Rust lints	0s
Build Turborepo (macos, macos-latest)	2m 53s
Build Turborepo (windows, windows-latest)	9m 52s
Turborepo rust check	0s
Turbopack TypeScript files	0s
Formatting	1m 51s
Check next-swc	0s
Turbopack rust check	0s
Turbopack Rust testing benchmarks on ${{ matrix.os.name }}	0s
Turbopack Rust testing on ubuntu	0s
Turbopack Rust testing on ${{ matrix.os.name }}	0s
Turbopack rust clippy	0s
Turborepo rust clippy	0s
Turbopack Rust testing benchmarks on linux	0s
Turborepo Rust testing on ${{ matrix.os.name }}	0s
Upload Test results	26s
Turborepo Integration (ubuntu-latest)	4m 52s
Turborepo Integration (macos-latest)	12m 44s
Turborepo Integration (windows-latest)	26m 15s
Ok	3s
Done	4s
Cleanup / cleanup	2s
	1h 11m 28s

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