🤖 fix: remove postinstall script for prebuilt node-pty

The @homebridge/node-pty-prebuilt-multiarch package includes prebuilt
binaries for both Node.js and Electron, so no rebuild is needed during
installation. This simplifies the install process and removes the need
for the postinstall script.

_Generated with `mux`_

Author: sreya

package.json

@@ -16,7 +16,6 @@
     "access": "public"
   },
   "scripts": {
-    "postinstall": "./scripts/postinstall.sh",
     "dev": "make dev",
     "prebuild:main": "./scripts/generate-version.sh",
     "build": "make build",