Drop unused eslint-plugin-relay-types from apps

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>

apps/trust/tsconfig.node.json

@@ -20,8 +20,7 @@
     "noUnusedParameters": true,
     "erasableSyntaxOnly": true,
     "noFallthroughCasesInSwitch": true,
-    "noUncheckedSideEffectImports": true,
-    "types": ["@probo/eslint-plugin-relay-types"]
+    "noUncheckedSideEffectImports": true
   },
-  "include": ["vite.config.ts", "eslint.config.mjs"]
+  "include": ["vite.config.ts"]
 }