perf(es/minifier): rm var_kind in VarUsageInfo

[bvanjoi]

No description provided.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3405b46

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[codspeed-hq]

CodSpeed Performance Report

Merging #10946 will not alter performance

_{Comparing bvanjoi:main (3405b46) with main (63172ef)}

Summary

✅ 140 untouched benchmarks

[kdy1]

It regressed perf