Fix: remove unneeded @std/dotenv/load import breaking Vercel deployment

[diogocouto18]

Problem

Deploying this project to Vercel (via the vercel-deno runtime declared in vercel.json) fails on every request with a 500 error:

TypeError: JSR package manifest for '@std/dotenv' failed to load. Read-only file system (os error 30)

Cause

api/index.ts imports @std/dotenv/load, which loads a local .env file into Deno.env. On Vercel this import is resolved lazily at request time by the vercel-deno runtime, which tries to write to its JSR dependency cache — but Vercel's serverless function filesystem is read-only, so the import fails and every request 500s.

The import isn't actually needed in this environment: Vercel already injects environment variables directly into the process, so there's no .env file to load in the first place.

Fix

Remove the import "@std/dotenv/load"; line. No other changes.

Testing

Verified on a personal fork deployed to Vercel: before the fix, every request returned 500 FUNCTION_INVOCATION_FAILED; after removing the import, the trophy SVG renders correctly.

[diogocouto18]

Closing in favor of #469, which reaches the same root cause fix (bare @std/dotenv/load specifier failing to resolve under vercel-deno on Vercel's read-only filesystem) via a better-preserving approach — it keeps local .env loading working via deno.land/std, whereas this PR just removes the import outright. Left a confirmation review on #469 since I independently reproduced and tested the same issue.