Update programs

Author: damienbod

aspnetcore/security/authentication/configure-oidc-web-authentication/sample/oidc-net8/RazorPageOidcClient/Program.cs

@@ -2,7 +2,6 @@
 using Microsoft.AspNetCore.Authentication.OpenIdConnect;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc.Authorization;
-using Microsoft.Extensions.Configuration;
 using Microsoft.IdentityModel.JsonWebTokens;
 using Microsoft.IdentityModel.Protocols.OpenIdConnect;
 using Microsoft.IdentityModel.Tokens;