Auto completion for op command `show file` is broken.
When pressing tab for auto completion, an error `Invalid command: [_vyatta_image_file_complete]` is returned because legacy Vyatta interpreter file `vyatta-image-complete` has been removed.
```
vyos@vyos:~$ copy file
Invalid command: [_vyatta_image_file_complete]
Possible completions:
file Copy a file or a directory
```