Ensure static class has no defined constructor

aeon/io/streams.py

@@ -62,7 +62,7 @@ def _createStreams(path, *args):
                 try:
                     streams.update(callable(path))
                 except TypeError:
-                    if inspect.isclass(callable):
+                    if inspect.isclass(callable) and not hasattr(callable, "__init__"):
                         warn(
                             f"Stream group classes with no constructors are deprecated. {callable}",
                             category=DeprecationWarning,