refactor(fixtures): remove prepare script from nitro-api

The nuxt prepare step is no longer needed for the nitro-api fixture,
so the redundant script is dropped to simplify the test setup.

Author: myshkouski

fixtures/nitro-api/package.json

@@ -2,9 +2,6 @@
   "private": true,
   "name": "nuxt-drizzle-nitro-api",
   "type": "module",
-  "scripts": {
-    "prepare": "nuxt prepare"
-  },
   "dependencies": {
     "@electric-sql/pglite": "catalog:",
     "better-sqlite3": "catalog:",