NOTE! In order to remove a vDC you need to:
first, remove any available Networks
secondly, remove any available Edge Gateways
thirdly, remove the vDC
1. Navigate to the vCloud Service
2. Click on Services and then click on Manage Virtual Data Centres
3. Go to the vDC you would like to remove and click on Select
4. Click on the Delete button in order to remove the vDC