Can we remove the rsabase tests?

[Paul Vriens]

Hi,

We have only a few (3) tests in the rsabase tests. The same tests are also 
available in the rsaenh tests.

The reason I think they can be removed:

- rsaenh seems to be available most platforms. If not then also rsabase is not 
available (by checking test.winehq.org)
- rsabase is not available on XP and above
- we forward all rsabase calls to rsaenh anyway