* Remove unused `find_entity_child_by_path` API
* Remove unused `fetch_file_from_guest` API as this has separate module
vmware_guest_file_operation
* Remove unused `push_file_to_guest` API as this has separate module
vmware_guest_file_operation
* Refactor exception variables
* Change GPL License boilerplate to one-liner
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>