Remove references to Mobility in front page.
Remove references to Mobility in front page.

Change-Id: I0c617016508d53a4be2eac0c8cdc29145a1c82b7
Reviewed-by: Peter Yard <41e61679158281a4a318f499f7cb605170fa8f34@nokia.com>
Sanity-Review: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Alex <3f9b327efd0f2b2e684d51660e829d1496ae5581@nokia.com>

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