Remove unused code of Update Environment dialog
Remove unused code of Update Environment dialog

Change-Id: I78a74f1f63863771d7bb6c4ba84d1cc41611b32d

stackforge/fuel-web,SmartInfrastructures/fuel-web-dev,huntxu/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,huntxu/fuel-web,huntxu/fuel-web,stackforge/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,huntxu/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,stackforge/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,SmartInfrastructures/fuel-web-dev