Remove [Obsolete] action result code

We have obsolete overrides of `ActionResult.ExecuteResult(...)` that are unused by any of our other code and should be removed in a major release. 

This isn't an API breaking change, but users might have called these methods, which will now no-op.
```
RedirectResult
LocalRedirectResult
RedirectToActionResult
RedirectToPageResult
RedirectToRouteResult
```