Remove redundant "Successfully signed out" notification (microsoft#251512)

Author: Copilot

src/vs/workbench/api/browser/mainThreadAuthentication.ts

@@ -53,7 +53,6 @@ export class MainThreadAuthenticationProvider extends Disposable implements IAut
 		public readonly label: string,
 		public readonly supportsMultipleAccounts: boolean,
 		public readonly authorizationServers: ReadonlyArray<URI>,
-		private readonly notificationService: INotificationService,
 		onDidChangeSessionsEmitter: Emitter<AuthenticationSessionsChangeEvent>,
 	) {
 		super();
@@ -70,7 +69,6 @@ export class MainThreadAuthenticationProvider extends Disposable implements IAut
 
 	async removeSession(sessionId: string): Promise<void> {
 		await this._proxy.$removeSession(this.id, sessionId);
-		this.notificationService.info(nls.localize('signedOut', "Successfully signed out."));
 	}
 }
 
@@ -153,7 +151,7 @@ export class MainThreadAuthentication extends Disposable implements MainThreadAu
 		const emitter = new Emitter<AuthenticationSessionsChangeEvent>();
 		this._registrations.set(id, emitter);
 		const supportedAuthorizationServerUris = supportedAuthorizationServer.map(i => URI.revive(i));
-		const provider = new MainThreadAuthenticationProvider(this._proxy, id, label, supportsMultipleAccounts, supportedAuthorizationServerUris, this.notificationService, emitter);
+		const provider = new MainThreadAuthenticationProvider(this._proxy, id, label, supportsMultipleAccounts, supportedAuthorizationServerUris, emitter);
 		this.authenticationService.registerAuthenticationProvider(id, provider);
 	}