Revert "Import aliasable crate"

Revert submission 2428041-ouroboros-import

Reason for revert: b/271004059
Reverted changes: /q/submissionid:2428041-ouroboros-import

Change-Id: Ifeb91bc50ca2954a6e2125119c2a1fad487fa02e
14 files changed
tree: 4b825dc642cb6eb9a060e54bf8d69288fbee4904

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