remove deprecation for Rbac.search :target => []
remove deprecation for Rbac.search :target => []

There was only 1 use case passing in an empty array meaning find all.
Now that this is gone, remove deprecation warnings.

removed here: 6b0aa2bd62aaf84045c0ad52c8fc5bb76aae8cc9
see:
- vms = []
+ vms = VmOrTemplate.all
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