Fix loading calendar colors from EventViews in the events plugin
The plugin was trying to load colors from the KOrganizer config, but this has been moved to EventViews. As a result, the data source was assigning random colors to the Akonadi resources, which ended up messing up KOrganizer's colors.
I couldn't test that this fixes the issue reported in 492279, but the code is obviously incorrect and needs to be fixed.
BUG: 492279