build: remove undici

Node provides now its own fetch implementation, so we can remove undici from our dependencies and use the built-in one instead.

Author: JeanMeche

.github/actions/deploy-docs-site/BUILD.bazel

@@ -11,7 +11,6 @@ esbuild_checked_in(
     config = "esbuild.conf.js",
     entry_point = ":lib/main.mts",
     external = [
-        "undici",
         "pnpapi",
     ],
     metafile = False,