make Cocina::Models::Validators::DarkValidator#invalid_files a bit more concise/idiomatic #645
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Why was this change made? 🤔
cribbed off this class for
LanguageTagValidator
, switched to something more concise for a similar method there, doing the same heresee #643
How was this change tested? 🤨
(existing) unit tests
⚡ ⚠ If this change has cross service impact, run integration tests and/or test in [stage|qa] environment, in addition to specs. ⚡