Remove prod playground

Since it requires prod database credentials, most user wont be able to
use it.  Playground can still be run against prod database using the
proper DATABASE_URL.

package.json

@@ -6,8 +6,7 @@
     "preinstall": "npx only-allow npm",
     "prepare": "husky install && bash playground/setup-playground.sh",
     "proxy-prod": "fly proxy 5434:5432 --app teerankio-postgres",
-    "playground:dev": "ts-node playground/playground.dev.ts",
-    "playground:prod": "DATABASE_URL=postgres://postgres-test:postgres-test@localhost:5434/teerank ts-node playground/playground.prod.ts"
+    "playground": "ts-node playground/playground.ts"
   },
   "private": true,
   "devDependencies": {

playground/example.ts

@@ -7,9 +7,7 @@ export const prisma = new PrismaClient({
 });
 
 async function main() {
-  // This is a playground to test the code.  Run it using `npm run playground:dev`
-  // or `npm run playground:prod`.  Be careful with the code you write here if
-  // you are running it against prod.
+  // This is a playground to test the code.  Run it using `npm run playground`.
 }
 
 main()

playground/setup-playground.sh

@@ -1,3 +1,2 @@
-cp -n playground/example.ts playground/playground.dev.ts
-cp -n playground/example.ts playground/playground.prod.ts
+cp -n playground/example.ts playground/playground.ts
 echo "Playground setup complete"