Remove previewFeatures and default to Gemini 3 (#18414)

packages/cli/src/ui/AppContainer.tsx

@@ -246,7 +246,7 @@ export const AppContainer = (props: AppContainerProps) => {
     [defaultBannerText, warningBannerText],
   );
 
-  const { bannerText } = useBanner(bannerData, config);
+  const { bannerText } = useBanner(bannerData);
 
   const extensionManager = config.getExtensionLoader() as ExtensionManager;
   // We are in the interactive CLI, update how we request consent and settings.
@@ -1772,7 +1772,8 @@ Logging in with Google... Restarting Gemini CLI to continue.
 
     const fetchBannerTexts = async () => {
       const [defaultBanner, warningBanner] = await Promise.all([
-        config.getBannerTextNoCapacityIssues(),
+        // TODO: temporarily disabling the banner, it will be re-added.
+        '',
         config.getBannerTextCapacityIssues(),
       ]);
 
@@ -1780,15 +1781,6 @@ Logging in with Google... Restarting Gemini CLI to continue.
         setDefaultBannerText(defaultBanner);
         setWarningBannerText(warningBanner);
         setBannerVisible(true);
-        const authType = config.getContentGeneratorConfig()?.authType;
-        if (
-          authType === AuthType.USE_GEMINI ||
-          authType === AuthType.USE_VERTEX_AI
-        ) {
-          setDefaultBannerText(
-            'Gemini 3 Flash and Pro are now available. \nEnable "Preview features" in /settings. \nLearn more at https://goo.gle/enable-preview-features',
-          );
-        }
       }
     };
     // eslint-disable-next-line @typescript-eslint/no-floating-promises