Update index.md

Fixes #34823

Author: Rick-Anderson

aspnetcore/security/authentication/social/index.md

@@ -48,7 +48,6 @@ Enabling users to sign in with their existing credentials:
   * The `dotnet new` command creates a new Razor Pages project in the *WebApp1* folder.
   * `-au Individual` creates the code for Individual authentication.
   * `-uld` uses LocalDB, a lightweight version of SQL Server Express for Windows. Omit `-uld` to use SQLite.
-  * The `code` command opens the *WebApp1* folder in a new instance of Visual Studio Code.
 
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