Remove initState call for the charmbrowser since it's all handled by the state class now

This is the fix for: https://bugs.launchpad.net/juju-gui/+bug/1327424

The initState call was left in the app but it's no longer needed because the charmbrowser controls are all handled directly by the state class.

#### To QA
Click the Juju icon in the to left, no error? OK!