Fix mypy

Author: kaushikb11

pytorch_lightning/utilities/registry.py

@@ -12,10 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import inspect
-from typing import Callable
+from typing import Any
 
 
-def _is_register_method_overridden(mod: type, base_cls: Callable, method: str) -> bool:
+def _is_register_method_overridden(mod: type, base_cls: Any, method: str) -> bool:
     mod_attr = getattr(mod, method)
     previous_super_cls = inspect.getmro(mod)[1]