perf(es/parser): Remove start in State

[CPunisher]

Description:

The only use of start is in error span read_digits so I think it can be removed.

[changeset-bot]

⚠️ No Changeset found

Latest commit: a23e695

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[codspeed-hq]

CodSpeed Performance Report

Merging #11201 will not alter performance

_{Comparing CPunisher:10-29-perf/remove-state-start (a23e695) with main (7b5bcd7)}

Summary

✅ 138 untouched
⏩ 13 skipped¹

Footnotes

1. 13 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩