Current implementation just removes record about installation from windows registry.
What it should do:
1. Remove virtual box from vagrant:

vagrant box remove cdkv2

2. Remove virtual machine from virtual box

vboxmanage --unregister ${vmname}

3. Uninstall what was installed:
vargant
virtual box
developer studio
4. Delete:
CDK
Open JDK 8
5. Cleanup PATH env variable