Remove unused variable

Change-Id: I8dbd4307b0b5dad1d35e28d13703ceeeeaaa66c5
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Convert QQmlListModel to v4

Remove all usages of v8 API in the list model.

Change-Id: I9dc8acecbbc77a97cf3c2a318e222bdb4b05c7c5
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>