Doc: remove link to Qt Simulator
Doc: remove link to Qt Simulator

Qt Simulator is not currently provided for Qt 5.

Change-Id: Ib3914967cb8b888a5c7ed4f407b62bc776df84b2
Reviewed-by: Jerome Pasion <c10995d24f6b454503389e8d00d837aef038985d@digia.com>

kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc