chore: remove failing postinstall script

which runs quasar prepare, which requires ui package to be built due to logic in vite-plugin
removing at least until quasarframework#17935 gets merged

Author: yusufkandemir

package.json

@@ -4,7 +4,6 @@
   "packageManager": "[email protected]",
   "scripts": {
     "preinstall": "npx [email protected] pnpm",
-    "postinstall": "pnpm prepare",
     "prepare": "pnpm --recursive --parallel prepare",
     "lint:root": "eslint --cache --fix ./*.js ./*.mjs",
     "lint:non-workspace": "cd icongenie && pnpm lint && cd ..",