fix(mobile): remove duplicate analytics import in ContestScreen

[raymondjacobson]

Summary

• Fixes mobile CI failure (typecheck + lint) caused by a duplicate import { make, track as trackEvent } from 'app/services/analytics' in ContestScreen.tsx.
• The duplicate (out-of-order) copy is removed; the properly ordered import is retained.

Test plan

• CI mobile verify (typecheck, lint, lint:env) passes.

🤖 Generated with Claude Code

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Latest commit: 6fc437b

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