ntdll/tests: Remove an unneeded NONAMELESSSTRUCT directive. (try2)

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=12159

Your paranoid android.


=== wvistau64 (32 bit exception) ===
exception.c:485: Test failed: 42: Wrong exception address 003E0000/003E0001
exception: unhandled exception 80000004 at 003E0000
exception.c:485: Test failed: 42: Wrong exception address 7751ED97/003E0001

=== w7u (32 bit exception) ===
exception.c:485: Test failed: 42: Wrong exception address 002F0000/002F0001
exception: unhandled exception 80000004 at 002F0000
exception.c:485: Test failed: 42: Wrong exception address 77CDE34F/002F0001

=== w8 (32 bit exception) ===
exception.c:485: Test failed: 42: Wrong exception address 003E0000/003E0001
exception: unhandled exception 80000004 at 003E0000
exception.c:485: Test failed: 42: Wrong exception address 77174D17/003E0001