[Swiftify] clean up (NFC) (swiftlang#80400)

* [Swiftify] Extract static methods to free functions (NFC)

This will make the diff smaller with introducing
_SwiftifyImportProtocol.

* [Swiftify] Run swift-format (NFC)

* [Swiftify] Remove `try` from non-throwing expression (NFC)

Author: hnrklssn