feat!: bump FlutterFire dependencies & remove deprecated API

packages/firebase_ui_auth/example/pubspec.yaml

@@ -22,8 +22,8 @@ environment:
 
 dependencies:
   cupertino_icons: ^1.0.6
-  firebase_auth: ^5.7.0
-  firebase_core: ^3.15.2
+  firebase_auth: ^6.0.0
+  firebase_core: ^4.0.0
   flutter:
     sdk: flutter
   flutter_localizations:

packages/firebase_ui_auth/lib/firebase_ui_auth.dart

@@ -19,7 +19,6 @@ export 'src/auth_flow.dart';
 export 'src/auth_state.dart'
     show
         Uninitialized,
-        FetchingProvidersForEmail,
         AuthStateListenerCallback,
         AuthState,
         AuthStateListener,
@@ -29,16 +28,12 @@ export 'src/auth_state.dart'
         SigningIn,
         UserCreated,
         AuthFailed,
-        // ignore: deprecated_member_use_from_same_package
-        DifferentSignInMethodsFound,
         MFARequired;
 export 'src/email_verification.dart';
 export 'src/flows/email_flow.dart';
 export 'src/flows/email_link_flow.dart';
 export 'src/flows/oauth_flow.dart' show OAuthController, OAuthFlow;
 export 'src/flows/phone_auth_flow.dart';
-export 'src/flows/universal_email_sign_in_flow.dart';
-// ignore_for_file: use_build_context_synchronously
 
 export 'src/mfa.dart' show startMFAVerification;
 export 'src/navigation/authentication.dart';
@@ -51,7 +46,6 @@ export 'src/providers/auth_provider.dart';
 export 'src/providers/email_auth_provider.dart';
 export 'src/providers/email_link_auth_provider.dart';
 export 'src/providers/phone_auth_provider.dart';
-export 'src/providers/universal_email_sign_in_provider.dart';
 export 'src/screens/email_link_sign_in_screen.dart';
 export 'src/screens/email_verification_screen.dart';
 export 'src/screens/forgot_password_screen.dart';
@@ -62,20 +56,16 @@ export 'src/screens/profile_screen.dart' show ProfileScreen;
 export 'src/screens/register_screen.dart';
 export 'src/screens/sign_in_screen.dart';
 export 'src/screens/sms_code_input_screen.dart';
-export 'src/screens/universal_email_sign_in_screen.dart';
 export 'src/styling/style.dart' show FirebaseUIStyle;
 export 'src/styling/theme.dart' show FirebaseUITheme;
-export 'src/views/different_method_sign_in_view.dart';
 export 'src/views/email_link_sign_in_view.dart';
-export 'src/views/find_providers_for_email_view.dart';
 export 'src/views/forgot_password_view.dart';
 export 'src/views/login_view.dart';
 export 'src/views/phone_input_view.dart';
 export 'src/views/reauthenticate_view.dart';
 export 'src/views/sms_code_input_view.dart';
 export 'src/widgets/auth_flow_builder.dart';
 export 'src/widgets/delete_account_button.dart';
-export 'src/widgets/different_method_sign_in_dialog.dart';
 export 'src/widgets/editable_user_display_name.dart';
 export 'src/widgets/email_form.dart'
     show EmailForm, ForgotPasswordAction, EmailFormStyle;

packages/firebase_ui_auth/lib/src/auth_flow.dart

@@ -113,11 +113,6 @@ class AuthFlow<T extends AuthProvider> extends ValueNotifier<AuthState>
     value = CredentialReceived(credential);
   }
 
-  @override
-  void onBeforeProvidersForEmailFetch() {
-    value = const FetchingProvidersForEmail();
-  }
-
   @override
   void onBeforeSignIn() {
     value = const SigningIn();
@@ -128,24 +123,6 @@ class AuthFlow<T extends AuthProvider> extends ValueNotifier<AuthState>
     value = CredentialLinked(credential, auth.currentUser!);
   }
 
-  @override
-  @Deprecated(
-    'Email enumeration protection is on by default.'
-    'Read more here https://cloud.google.com/identity-platform/docs/admin/email-enumeration-protection',
-  )
-  @override
-  void onDifferentProvidersFound(
-    String email,
-    List<String> providers,
-    fba.AuthCredential? credential,
-  ) {
-    value = DifferentSignInMethodsFound(
-      email,
-      providers,
-      credential,
-    );
-  }
-
   @override
   void onSignedIn(fba.UserCredential credential) {
     if (credential.additionalUserInfo?.isNewUser ?? false) {

packages/firebase_ui_auth/lib/src/auth_state.dart

@@ -154,43 +154,6 @@ class UserCreated extends AuthState {
   UserCreated(this.credential);
 }
 
-/// {@template ui.auth.auth_state.different_sign_in_methods_found}
-/// An [AuthState] that indicates that there are different auth providers
-/// associated with an email that was used to authenticate.
-///
-/// See [AuthState] docs for usage examples.
-/// {@endtemplate}
-@Deprecated(
-  'Email enumeration protection is on by default.'
-  'Read more here https://cloud.google.com/identity-platform/docs/admin/email-enumeration-protection',
-)
-class DifferentSignInMethodsFound extends AuthState {
-  /// An email that has different auth providers associated with.
-  final String email;
-
-  /// An instance of the auth credential that was obtained during sign in flow.
-  /// Could be used to link with the user account after a sign in using on of
-  /// the available [methods].
-  final AuthCredential? credential;
-
-  /// A list of provider ids that were found for the [email].
-  final List<String> methods;
-
-  /// {@macro ui.auth.auth_state.different_sign_in_methods_found}
-  DifferentSignInMethodsFound(this.email, this.methods, this.credential);
-}
-
-/// {@template ui.auth.auth_state.fetching_providers_for_email}
-/// An [AuthState] that indicates that there is a lookup of available providers
-/// for an email in progress.
-///
-/// See [AuthState] docs for usage examples.
-/// {@endtemplate}
-class FetchingProvidersForEmail extends AuthState {
-  /// {@macro ui.auth.auth_state.fetching_providers_for_email}
-  const FetchingProvidersForEmail();
-}
-
 /// {@template ui.auth.auth_state.mfa_required}
 /// An [AuthState] that indicates that multi-factor authentication is required.
 /// {@endtemplate}