test: Remove insignificant mark from tst_qquickgridview

Tests are passing nowaways on OS X.

Task-number: QTBUG-27890
Change-Id: Iddceb2f0641115f03e5116c38e95ae5772938248
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
test: Remove insignificant mark from tst_touchmouse

Tests are passing nowaways on OS X.

Task-number: QTBUG-27890
Change-Id: I2245801a44b9b6fd8773c91e2d5dd67f5a5b7373
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>