user32/tests: Remove obsolete comment

[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
http://testbot.winehq.org/JobDetails.pl?Key=7336

Your paranoid android.


=== W7PRO (32 bit input) ===
input.c:817: Test failed:  0 (a4/0): the msg sequence is not complete: expected 0000 - actual c0ae