Remove extraneous print from sign in class

lib/screens/sign_in.dart

@@ -385,8 +385,6 @@ class _SignInScreenState extends State<SignInScreen> {
       return;
     }
 
-    print('Sign in credentials: ${creds.toJson()}');
-
     final result = await getIt<AccountsService>().signIn(creds);
     if (mounted && result.isFailure) {
       buildSnackbar(context, 'Error signing in: ${result.error}');