diff --git a/src/nns/_native.py b/src/nns/_native.py
index 7c3eb41b..1f716f75 100644
--- a/src/nns/_native.py
+++ b/src/nns/_native.py
@@ -2,7 +2,7 @@
 
 import importlib
 import importlib.util
-from typing import Any, cast
+from typing import Any
 
 _NNSCORE_SPEC = importlib.util.find_spec("nns._nnscore")
 
@@ -12,11 +12,6 @@
     _nnscore = None
 
 
-def nnscore() -> Any | None:
-    """Return the optional private NNS-core extension module when available."""
-    return cast(Any | None, _nnscore)
-
-
 def native_fn(name: str) -> Any | None:
     """Return a callable from the NNS-core extension, or None when unavailable."""
     if _nnscore is None: