Remove redundant code comments

[moodysalem]

Removes narrative code comments that restate the code from the build, check and benchmark scripts and the font stylesheet. Documentation pages, contract sources and contract examples are not touched.

What changed

• 43 comments removed from scripts, and the header comment from src/styles/fonts.css.
• Kept:
  • the @ts-check directive;
  • the comments in the benchmark scripts that record where each event signature and L2 fee formula came from, and how calldata is laid out. Those are the provenance of figures published on the gas page.
  • The comments in PolicyEditor.astro stay too, because they explain the schema $ref expansion and a type cast.

Equivalence

• Comments were found with the TypeScript parser. Every changed script emits the same tokens before and after.
• The stylesheet parses to the same PostCSS rules.

Checks

All passing: bun run format:check, bun run lint, bun run check, bun run build. The OpenAPI files that the build re-syncs from the live API were left out of this change.