Update README.md (#28734)

@xster

dev/bots/README.md

@@ -48,8 +48,7 @@ To run prepare_package.dart locally:
 - Make sure the depot_tools is in your PATH. If you're on Windows, you also need
   an environment variable called DEPOT_TOOLS with the path to depot_tools as value.
 - Run `gsutil.py config` (or `python %DEPOT_TOOLS%\gsutil.py` on Windows) to
-  authenticate with your auth token. When asked, the GCP project ID is
-  `turquoise-dev`.
+  authenticate with your auth token.
 - Create a local temp directory. `cd` into it.
 - Run `dart [path to your normal Flutter repo]/dev/bots/prepare_package.dart
   --temp_dir=. --revision=[revision to package] --branch=[branch to deploy to]