Remove use_metaclass, it's no longer used

parso/_compatibility.py

@@ -14,13 +14,6 @@ except NameError:
 is_pypy = platform.python_implementation() == 'PyPy'
 
 
-def use_metaclass(meta, *bases):
-    """ Create a class with a metaclass. """
-    if not bases:
-        bases = (object,)
-    return meta("HackClass", bases, {})
-
-
 try:
     encoding = sys.stdout.encoding
     if encoding is None:

parso/normalizer.py

@@ -1,7 +1,5 @@
 from contextlib import contextmanager
 
-from parso._compatibility import use_metaclass
-
 
 class _NormalizerMeta(type):
     def __new__(cls, name, bases, dct):
@@ -11,7 +9,7 @@ class _NormalizerMeta(type):
         return new_cls
 
 
-class Normalizer(use_metaclass(_NormalizerMeta)):
+class Normalizer(metaclass=_NormalizerMeta):
     _rule_type_instances = {}
     _rule_value_instances = {}