No, it's stil there though I found a workaround after MANY attempts. Try this:
- Goto: Tools --> Options --> Xamarin -- Apple Accounts and Remove the account
- Shut down all running session of Visual Studio
- Re-open the solution
- Navigate to the Bundle signing page. It asks for an account now, which you can enter and continue your work
For me this workaround at least gives me the option to continue development..