The @probo/eslint-plugin-relay-types shim only types an
`eslint-plugin-relay` import, which no app makes anymore now that
linting runs through the single root eslint.config.mjs. The apps'
tsconfig.node.json even pulled it in for a per-app eslint.config.mjs
that no longer exists.
Remove the devDependency and the `types` entry from each app's
node tsconfig, and drop the stale eslint.config.mjs include. The
shim stays for packages/eslint-config, its real consumer.
Signed-off-by: Émile Ré <emile@probo.com>
