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[Deprecation] Remove old _Backend enum #30416

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[Deprecation] Remove old _Backend enum #30416

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1 change: 0 additions & 1 deletion docs/design/plugin_system.md
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Expand Up @@ -153,4 +153,3 @@ The interface for the model/module may change during vLLM's development. If you

!!! warning "Deprecations"
- `use_v1` parameter in `Platform.get_attn_backend_cls` is deprecated. It will be removed in v0.13.0 or v1.0.0.
- `_Backend` in `vllm.attention` is deprecated. It will be removed in v0.13.0 or v1.0.0. Please use `vllm.attention.backends.registry.register_backend` to add new attention backend to `AttentionBackendEnum` instead.
32 changes: 0 additions & 32 deletions vllm/attention/backends/registry.py
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Expand Up @@ -252,35 +252,3 @@ def decorator(cls: type) -> type:
return lambda x: x

return decorator


# Backwards compatibility alias for plugins
class _BackendMeta(type):
"""Metaclass to provide deprecation warnings when accessing _Backend."""

def __getattribute__(cls, name: str):
if name not in ("__class__", "__mro__", "__name__"):
logger.warning(
"_Backend has been renamed to AttentionBackendEnum. "
"Please update your code to use AttentionBackendEnum instead. "
"_Backend will be removed in a future release."
)
return getattr(AttentionBackendEnum, name)

def __getitem__(cls, name: str):
logger.warning(
"_Backend has been renamed to AttentionBackendEnum. "
"Please update your code to use AttentionBackendEnum instead. "
"_Backend will be removed in a future release."
)
return AttentionBackendEnum[name]


class _Backend(metaclass=_BackendMeta):
"""Deprecated: Use AttentionBackendEnum instead.

This class is provided for backwards compatibility with plugins
and will be removed in a future release.
"""

pass
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