image-rs: drop Occlum UnionFS snapshotter #1206
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Given enclave-cc deprecation, the Occlum libOS specific snapshotter used by enclave-cc is no longer needed. Remove it along with the cargo features used to toggle between the two snapshotter implementations. The Snapshotter trait object handling is kept but this could also be removed in the future. default_snapshotter setting in Image Config is kept but ignored for compatibility. The Display impl for Snapshotter is also removed since it can be replaced with OverlayFS internals. Signed-off-by: Mikko Ylinen <[email protected]>
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Given enclave-cc deprecation, the Occlum libOS specific snapshotter used by enclave-cc is no longer needed.
Remove it along with the cargo features used to toggle between the two snapshotter implementations.
The Snapshotter trait object handling is kept but this could also be removed in the future. default_snapshotter setting in Image Config is kept but ignored for compatibility.
The Display impl for Snapshotter is also removed since it can be replaced with OverlayFS internals.