removed deprecator since it does not work correctly

got rid of vcloud-launcher deprecator, since
- it does not give correct warnings to user and it is misguiding.
- also it is difficult to fix it , since we do not know what all file
  formats we should support.
- we should add deprecator in future, if we change the launcher yaml
  file format. also we should mention such change in github release-notes.


cc @annashipman & @mikepea : please take a look.