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Cleanup shared constants. NFC (#8922)

- Remove some unused shared constants.
- For constants that are only used in a single file move them there
- Be consistent about how static Names are initialized.
S
Sam Clegg committed
74ff1eb9cc8393f16854014667e540a3ba883b97
Parent: e273451
Committed by GitHub <noreply@github.com> on 7/21/2026, 3:20:01 PM