Revert "Temporary workaround for failing unit test on win8 config in CI"

This reverts commit 93773ce48d3f884fbd71a6783d317bda1880bd37.

The related bug was fixed in qtdeclarative
(see c6da58a295235c89ee2a5847b15cb0b1dc66b2f4)

Task-number: QTBUG-36519
Change-Id: I233d08f091fb3273f111d41c4743808d8aaf4637
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>