chore(npm): remove postinstall script

Author: mgcrea

package.json

@@ -26,8 +26,7 @@
     "typecheck": "tsc --noEmit",
     "spec": "jest",
     "test": "npm run typecheck && npm run spec && npm run lint && npm run prettycheck",
-    "prepublishOnly": "npm run build",
-    "postinstall": "scripts/install.js"
+    "prepublishOnly": "npm run build"
   },
   "peerDependencies": {
     "react-native-gesture-handler": ">=2",