Remove previously deprecated cached_property (#146478)

Co-authored-by: Robert Resch <robert@resch.dev>

homeassistant/backports/functools.py

@@ -1,31 +0,0 @@
-"""Functools backports from standard lib.
-
-This file contained the backport of the cached_property implementation of Python 3.12.
-
-Since we have dropped support for Python 3.11, we can remove this backport.
-This file is kept for now to avoid breaking custom components that might
-import it.
-"""
-
-from __future__ import annotations
-
-# pylint: disable-next=hass-deprecated-import
-from functools import cached_property as _cached_property, partial
-
-from homeassistant.helpers.deprecation import (
-    DeprecatedAlias,
-    all_with_deprecated_constants,
-    check_if_deprecated_constant,
-    dir_with_deprecated_constants,
-)
-
-# cached_property deprecated as of 2024.5 use functools.cached_property instead.
-_DEPRECATED_cached_property = DeprecatedAlias(
-    _cached_property, "functools.cached_property", "2025.5"
-)
-
-__getattr__ = partial(check_if_deprecated_constant, module_globals=globals())
-__dir__ = partial(
-    dir_with_deprecated_constants, module_globals_keys=[*globals().keys()]
-)
-__all__ = all_with_deprecated_constants(globals())

pylint/plugins/hass_imports.py

@@ -25,12 +25,6 @@ _OBSOLETE_IMPORT: dict[str, list[ObsoleteImportMatch]] = {
             constant=re.compile(r"^cached_property$"),
         ),
     ],
-    "homeassistant.backports.functools": [
-        ObsoleteImportMatch(
-            reason="replaced by propcache.api.cached_property",
-            constant=re.compile(r"^cached_property$"),
-        ),
-    ],
     "homeassistant.components.light": [
         ObsoleteImportMatch(
             reason="replaced by ColorMode enum",

tests/test_backports.py

@@ -1,36 +0,0 @@
-"""Test backports package."""
-
-from __future__ import annotations
-
-from functools import cached_property  # pylint: disable=hass-deprecated-import
-from types import ModuleType
-from typing import Any
-
-import pytest
-
-from homeassistant.backports import functools as backports_functools
-
-from .common import import_and_test_deprecated_alias
-
-
-@pytest.mark.parametrize(
-    ("module", "replacement", "breaks_in_ha_version"),
-    [
-        (backports_functools, cached_property, "2025.5"),
-    ],
-)
-def test_deprecated_aliases(
-    caplog: pytest.LogCaptureFixture,
-    module: ModuleType,
-    replacement: Any,
-    breaks_in_ha_version: str,
-) -> None:
-    """Test deprecated aliases."""
-    alias_name = replacement.__name__
-    import_and_test_deprecated_alias(
-        caplog,
-        module,
-        alias_name,
-        replacement,
-        breaks_in_ha_version,
-    )