user32/tests: Remove variable atom which is not really used from test_Expose.

[testbot at testbot.winehq.org]

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=1983

Your paranoid android.


=== W7PRO (32 bit win) ===
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 006C0178 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 006E0178 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 00060138 fg 00010040 in hook HCBT_SETFOCUS
win.c:2666: Test failed: GetActiveWindow() = 00000000
win.c:2666: Test failed: GetFocus() = 00000000
win.c:2692: Test failed: GetActiveWindow() = 00000000
win.c:2692: Test failed: GetFocus() = 00000000
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 00070138 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 00070136 fg 00010040 in hook HCBT_SETFOCUS
win.c:2751: Test failed: GetActiveWindow() = 00000000
win.c:2751: Test failed: GetFocus() = 00000000
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 0003015A fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 00300136 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 00310136 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 000301A0 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 000701A0 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 000801A0 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 00190138 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 00020142 fg 00010040 in hook HCBT_SETFOCUS
win.c:823: Test failed: wrong dwWindowStatus: 0000 != 0001 active 0003015A fg 00010040 in hook HCBT_SETFOCUS