nitrogen is not part of prebuild

Author: mfazekas

package.json

@@ -38,7 +38,7 @@
     "typecheck": "tsc",
     "lint": "eslint \"**/*.{js,ts,tsx}\"",
     "clean": "del-cli android/build example/android/build example/android/app/build example/ios/build lib",
-    "prepare": "yarn nitrogen && bob build",
+    "prepare": "bob build",
     "nitrogen": "nitrogen",
     "release": "release-it",
     "dev:ios": "cd example && xed ios",