remove references to extension

Author: alexwolfmsft

docs/azure/migration/appmod/quickstart.md

@@ -10,9 +10,8 @@ ms.author: alexwolf
 
 # Quickstart: Assess and migrate a .NET project with GitHub Copilot app modernization for .NET (Preview)
 
-In this quickstart, you assess and migrate a .NET project by using [GitHub Copilot app modernization for .NET (Preview)](https://aka.ms/ghcp-appmod/dotNET). You complete the following tasks:
+In this quickstart, you assess and migrate a .NET project by using GitHub Copilot app modernization for .NET. You complete the following tasks:
 
-- Install and configure the GitHub Copilot app modernization for .NET extension
 - Assess a sample project (Contoso University)
 - Start the migration process
 
@@ -29,20 +28,6 @@ GitHub Copilot is a dependency of the app modernization extension and experience
 
 For more information, see [Set up GitHub Copilot in Visual Studio](/visualstudio/ide/visual-studio-github-copilot-install-and-states).
 
-## Install the GitHub Copilot app modernization extension
-
-To complete the steps ahead, you need to install the [GitHub Copilot app modernization for .NET](https://aka.ms/appmod-dotnet-marketplace) extension.
-
-1. In Visual Studio, go to **Extensions** > **Manage Extensions**.
-1. Search for **GitHub Copilot app modernization for .NET** in the marketplace.
-1. On the extension page, select **Install**.
-1. Follow the notification bar prompts to close Visual Studio and complete the installation.
-1. Restart Visual Studio after installation.
-
-You can also view the [GitHub Copilot app modernization for .NET (Preview)](https://aka.ms/appmod-dotnet-marketplace) directly on the extension marketplace.
-
-For more information, see [Find, install, and manage extensions for Visual Studio](/visualstudio/ide/finding-and-using-visual-studio-extensions).
-
 ## Assess app readiness
 
 App Modernization for .NET assessment helps you identify your application readiness challenges, understand their impact, and find recommended migration tasks. Each migration task includes references to set up Azure resources, add configurations, and make code changes. Follow these steps to start your migration process with assessment: