chore: remove prompt at the beginning of lm:setup

[kaelig]

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Summary

Fixes an issue where the confirmation prompt introduced in #5975 was blocking invocations of lm:setup, which would be a breaking change.

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[github-actions]

📊 Benchmark results

Comparing with 40b3e78

• Dependency count: 1,331 (no change)
• Package size: 295 MB ⬆️ 0.02% increase vs. 40b3e78

[Skn0tt]

Hi! This is currently blocking main from being released, so i'll take this over and ship it :)