MAINT: Fix small mypy issue

bashtage · bashtage · commit 1c105582e928 · 2025-01-11T15:11:13.000Z
diff --git a/linearmodels/iv/absorbing.py b/linearmodels/iv/absorbing.py
@@ -69,7 +69,7 @@
 
 
 class Hasher:
-    def __init__(self):
+    def __init__(self) -> None:
         self._hasher: hashlib._Hash | xxh64
         if HAVE_XXHASH:
             self._hasher = xxh64()
