chore: drop Netlify

The site is built and deployed to Cloudflare Pages by hugo.yml and served by
Cloudflare; netlify.toml was referenced nowhere else and no Netlify build runs,
so the file only pinned toolchain versions for a deploy path that no longer
exists. No _redirects or _headers accompanied it.

netlify.toml

@@ -1,12 +0,0 @@
-[build.environment]
-DART_SASS_VERSION = "1.97.1"
-HUGO_VERSION = "0.154.0"
-NODE_VERSION = "24.12.0"
-TZ = "Asia/Ho_Chi_Minh"
-
-[build]
-publish = "public"
-command = """\
-  git config core.quotepath false && \
-  hugo --gc --minify --baseURL "${URL}"
-  """

plans/260918-0647-migrate-newsletter-engine-to-javascript/phase-04-retire-go-toolchain.md

@@ -94,7 +94,7 @@ outright — no version alignment needed.
 - [x] No `GO_VERSION` or Go-setup action reference remains in `.github/` or
       `netlify.toml`
 - [x] GitHub Actions `hugo.yml` deploys green — run 35329443556: build, Cloudflare Pages deploy and IndexNow all pass with no Go step
-- [ ] Netlify builds green — not applicable: the site is deployed to Cloudflare Pages by `hugo.yml` and served by Cloudflare; `netlify.toml` is referenced nowhere else in the repo, so no Netlify build was triggered to observe. The `GO_VERSION` line was still removed from it.
+- [x] Netlify builds green — moot: the site is deployed to Cloudflare Pages by `hugo.yml` and served by Cloudflare, and `netlify.toml` was referenced nowhere else in the repo, so there was no Netlify build to observe. The user dropped Netlify entirely on 2026-09-18 and the file is deleted.
 - [x] Deployed site output unchanged from the pre-phase-4 deploy — the deploy succeeded and https://miti99.com/ serves 200; Go never participated in the Hugo build
 - [x] The research report carries the override note; its original recommendation
       is still readable