Remove the deprecated cache compatibility later (#1597)

betty/app/__init__.py

@@ -28,7 +28,6 @@
     ConfigurableExtension,
 )
 from betty.asyncio import wait_to_thread
-from betty.cache import Cache, FileCache
 from betty.cache.file import BinaryFileCache, PickledFileCache
 from betty.config import Configurable, FileBasedConfiguration
 from betty.fetch import Fetcher
@@ -72,6 +71,7 @@
 from betty.warnings import deprecate
 
 if TYPE_CHECKING:
+    from betty.cache import Cache
     from betty.dispatch import Dispatcher
     from types import TracebackType
     from collections.abc import AsyncIterator
@@ -175,20 +175,6 @@ def dump(self) -> VoidableDump:
         return minimize({"locale": void_none(self.locale)}, True)
 
 
-class _BackwardsCompatiblePickledFileCache(PickledFileCache[Any], FileCache):
-    """
-    Provide a Backwards Compatible cache.
-
-    .. deprecated:: 0.3.3
-       This class is deprecated as of Betty 0.3.3, and will be removed in Betty 0.4.x.
-    """
-
-    @override
-    @property
-    def path(self) -> Path:
-        return self._path
-
-
 @final
 class App(Configurable[AppConfiguration]):
     """
@@ -240,7 +226,7 @@ def __init__(
             if cache_directory_path is None
             else cache_directory_path
         )
-        self._cache: Cache[Any] & FileCache | None = None
+        self._cache: Cache[Any] | None = None
         self._binary_file_cache: BinaryFileCache | None = None
         self._process_pool: Executor | None = None
 
@@ -660,12 +646,12 @@ def event_types(self) -> None:
         self._event_types = None
 
     @property
-    def cache(self) -> Cache[Any] & FileCache:
+    def cache(self) -> Cache[Any]:
         """
         The cache.
         """
         if self._cache is None:
-            self._cache = _BackwardsCompatiblePickledFileCache(
+            self._cache = PickledFileCache[Any](
                 self.localizer, self._cache_directory_path
             )
         return self._cache

betty/cache/__init__.py

@@ -7,12 +7,8 @@
 from collections.abc import Awaitable, Callable
 from typing import Self, Generic, TypeAlias, AsyncContextManager, overload, Literal
 
-import typing_extensions
 from typing_extensions import TypeVar
 
-if typing_extensions.TYPE_CHECKING:
-    from pathlib import Path
-
 
 _CacheItemValueT = TypeVar("_CacheItemValueT")
 _CacheItemValueCoT = TypeVar("_CacheItemValueCoT", covariant=True)
@@ -125,15 +121,3 @@ async def clear(self) -> None:
         Clear all items from the cache.
         """
         raise NotImplementedError
-
-
-@typing_extensions.deprecated(
-    f"This class is deprecated as of Betty 0.3.3, and will be removed in Betty 0.4.x. It exists only for App.cache's backwards compatibility. Use {Cache} instead."
-)
-class FileCache:  # noqa D101
-    @property
-    def path(self) -> Path:  # type: ignore[empty-body]  # noqa D102
-        pass
-
-    async def clear(self) -> None:  # noqa D102
-        pass