Remove empty env.d.ts ambient declaration - #3030
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The file held a single `declare module 'react-lifecycles-compat'` ambient declaration. That dependency was removed during the February 2026 tooling modernisation, leaving the file empty. Nothing includes it by name and it emits nothing, so it is dead.
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A dead-code pass across the repo turned up one orphaned file.
src/env.d.tsonce held a singledeclare module 'react-lifecycles-compat'ambient declaration. That dependency was removed during the February 2026 tooling modernisation (commit 58b607d), leaving the file empty. Nothing includes it by name and it emits nothing, so it is dead. This removes it.The rest of the repo was audited in the same pass and is clean: source helpers and exports, scripts, jest configs, devDependencies, README (references all nine examples), MIGRATION.md (the
withNProgressand UMD mentions are intentional upgrade history), the.githubworkflows,codecov.yml(live, uploaded from ci.yml), and thetest/reactmatrix (matches the boundary list in AGENTS.md). No other dead code was found.Verified with a full
npm testrun: format and type checks, lint, build, size gate, bundle tests, the full React version matrix, and 100% source coverage.