diff --git a/graphene/types/definitions.py b/graphene/types/definitions.py
index db3fb389..5190e59a 100644
--- a/graphene/types/definitions.py
+++ b/graphene/types/definitions.py
@@ -1,75 +1,3 @@
-from collections import OrderedDict
-import inspect
-from itertools import chain
-from functools import partial
-
-from graphql.utils.assert_valid_name import assert_valid_name
-
-from .options import Options
-
-
-class ClassTypeMeta(type):
-    options_class = Options
-
-    def __new__(mcs, name, bases, attrs):
-        super_new = super(ClassTypeMeta, mcs).__new__
-
-        module = attrs.pop('__module__', None)
-        doc = attrs.pop('__doc__', None)
-        new_class = super_new(mcs, name, bases, {
-            '__module__': module,
-            '__doc__': doc
-        })
-        attr_meta = attrs.pop('Meta', None)
-        if not attr_meta:
-            meta = getattr(new_class, 'Meta', None)
-        else:
-            meta = attr_meta
-
-        new_class._meta = new_class.get_options(meta)
-        return mcs.construct(new_class, bases, attrs)
-
-    def get_options(cls, meta):
-        raise NotImplementedError("get_options is not implemented")
-
-    def construct(cls, bases, attrs):
-        # Add all attributes to the class.
-        for name, value in attrs.items():
-            setattr(cls, name, value)
-
-        return cls
-
-
-class FieldsMeta(type):
-
-    def _build_field_map(cls, bases, local_fields):
-        from ..utils.extract_fields import get_base_fields
-        extended_fields = list(get_base_fields(cls, bases))
-
-        fields = []
-        field_names = set(f.name for f in local_fields)
-        for extended_field in extended_fields:
-            if extended_field.name in field_names:
-                continue
-            fields.append(extended_field)
-            field_names.add(extended_field.name)
-
-        fields.extend(local_fields)
-
-        return OrderedDict((f.name, f) for f in fields)
-
-    def _extract_local_fields(cls, attrs):
-        from ..utils.extract_fields import extract_fields
-        return extract_fields(cls, attrs)
-
-    def _fields(cls, bases, attrs, local_fields, extra_types=()):
-        from ..utils.is_graphene_type import is_graphene_type
-        inherited_types = tuple(
-            base._meta.graphql_type for base in bases if is_graphene_type(base) and not base._meta.abstract
-        ) + extra_types
-        return partial(cls._build_field_map, inherited_types, local_fields)
-
-
 class GrapheneGraphQLType(object):
     def __init__(self, *args, **kwargs):
         self.graphene_type = kwargs.pop('graphene_type')