Revert "fix build for MSVC 2010"

The condition in WinUser.h is _WIN32_WINNT >= 0x0602.
The original #if was correct.

This reverts commit 42d162addf82aa2064600219b9b3224836f676ac

Change-Id: I7a3098ced143fba7b31b138cc7aaaf8f6920bef3
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>