Fix pyrefly check bad-argument-count (#39416)

Author: jrmccluskey

sdks/python/apache_beam/ml/anomaly/specifiable.py

@@ -417,7 +417,7 @@ def unspecifiable(cls):
     _register(cls, spec_type)
 
     class_name = cls.__name__
-    original_init = cls.__init__  # type: ignore[misc]
+    original_init: Any = cls.__init__  # type: ignore[misc]
     cls.__init__ = new_init  # type: ignore[misc]
     if just_in_time_init:
       cls.__getattr__ = new_getattr

sdks/python/pyproject.toml

@@ -213,5 +213,4 @@ invalid-inheritance = "ignore"
 not-iterable = "ignore"
 unexpected-keyword = "ignore"
 invalid-yield = "ignore"
-bad-argument-count = "ignore"
 bad-typed-dict-key = "ignore"