remove previously deprecated code

Author: davidism

CHANGES.rst

@@ -4,6 +4,7 @@ Version 3.1.0
 Unreleased
 
 -   Drop support for Python 3.9.
+-   Remove previously deprecated code.
 
 
 Version 3.0.3

src/markupsafe/__init__.py

@@ -377,20 +377,3 @@ def __int__(self, /) -> int:
 
     def __float__(self, /) -> float:
         return float(self.obj)
-
-
-def __getattr__(name: str) -> t.Any:
-    if name == "__version__":
-        import importlib.metadata
-        import warnings
-
-        warnings.warn(
-            "The '__version__' attribute is deprecated and will be removed in"
-            " MarkupSafe 3.1. Use feature detection, or"
-            ' `importlib.metadata.version("markupsafe")`, instead.',
-            DeprecationWarning,
-            stacklevel=2,
-        )
-        return importlib.metadata.version("markupsafe")
-
-    raise AttributeError(name)