shell32/tests: Remove atime tests in ITEMIDLIST_format test.

[Austin Lund]

2009/11/23 Paul Vriens <paul.vriens.wine at gmail.com>:
>
> I'm curious how important a test on a FAT filesystem is.

I'm not overly concerned, but the way it is at the moment, my test
system will always fail with this test.

> What happens when these tests are run on Wine with a FAT filesystem btw?

I don't have such a system to test this on currently.