chore: remove now unused cached-property dep (#1867)

Author: harupy

pyproject.toml

@@ -14,7 +14,6 @@ dependencies = [
     "anyio>=3.5.0, <5",
     "distro>=1.7.0, <2",
     "sniffio",
-    "cached-property; python_version < '3.8'",
     "tqdm > 4",
     "jiter>=0.4.0, <1",
 ]

src/openai/_compat.py

@@ -226,9 +226,6 @@ def __set_name__(self, owner: type[Any], name: str) -> None: ...
         # __set__ is not defined at runtime, but @cached_property is designed to be settable
         def __set__(self, instance: object, value: _T) -> None: ...
 else:
-    try:
-        from functools import cached_property as cached_property
-    except ImportError:
-        from cached_property import cached_property as cached_property
+    from functools import cached_property as cached_property
 
     typed_cached_property = cached_property