remove unused devdependencies (#819)

site/package.json

@@ -6,10 +6,5 @@
   "license": "MIT",
   "scripts": {
     "build": "rm -rf public; mkdir public; cp ../.ci/install.sh ./public/install.txt"
-  },
-  "devDependencies": {
-    "@vercel/node": "2.5.22",
-    "typescript": "4.8.4",
-    "vercel": "26.0.0"
   }
 }

site/tsconfig.json

@@ -1,10 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "es5",
-    "module": "commonjs",
-    "strict": true,
-    "esModuleInterop": true,
-    "skipLibCheck": true,
-    "forceConsistentCasingInFileNames": true
-  }
-}