Utils: Remove unused TreeItem::m_populated
Utils: Remove unused TreeItem::m_populated

Left over from the original implementation used for the VariableChooser.

Change-Id: I164cb306815823c988b6d79966f007298f6d1e59
Reviewed-by: Niels Weber <df24410c43e1f71d7f720aa26e4fcb77ce70f242@theqtcompany.com>

martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,xianian/qt-creator,xianian/qt-creator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator