Remove Route annotation from an action in ASP.NET Core 8

[DotCat1985]

In my ASP.NET Core 8 project, I added a reference to a nuget package containing the following controller:

...

public class ShoppingCartController : Controller
{
 ...

 [HttpGet]
 [Route("cart")]
 public async Task<ActionResult> Index(string shoppingCartId = null)
 {
  ...
 }

 ...

}

How can I dynamically remove the data annotation [Route("cart")] from the Index action?
I would like remove this action with a code written inside the Startup.cs of ASP.NET Core 8 project, so I can remap this action using route.MapAreaControllerRoute() inside Startup.cs.