chore(lint): remove dead eslint-disable directives

The project lints with Biome only, so none of these 78 directives across 57
files ever suppressed anything. Directives that carried the rationale for a
flagged dynamic index access keep that rationale as a plain comment.

src/app/(site)/draw-badge/page.tsx

@@ -190,7 +190,6 @@ export default async function DrawBadgePage({
 											{b.badgeUrl ? (
 												// Badge images are arbitrary external URLs stored by the
 												// draw-badge tool, so a plain <img> is correct here.
-												// eslint-disable-next-line @next/next/no-img-element
 												<img
 													src={b.badgeUrl}
 													alt=""