refactor(codegen): remove the redundant base_len variable

[Dunqing]

A follow-up of #12847. I just noticed base_len is redundant

[Dunqing]

• refactor(codegen): remove the redundant base_len variable #12882 👈 (View in Graphite)
• main

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #12882 will not alter performance

_{Comparing 08-07-refactor_codegen_remove_the_redundant_base_len_variable (c48ee4f) with main (248fd94)¹}

Summary

✅ 34 untouched benchmarks

Footnotes

1. No successful run was found on main (bfacd66) during the generation of this report, so 248fd94 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩