Fixed flake8 issues

Author: syrusakbary

graphql/backend/__init__.py

@@ -9,7 +9,7 @@
 from .decider import GraphQLDeciderBackend
 from .cache import GraphQLCachedBackend
 
-if False:
+if False:  # flake8: noqa
     from typing import Union
 
 _default_backend = None

graphql/backend/base.py

@@ -4,7 +4,7 @@
 from abc import ABCMeta, abstractmethod
 import six
 
-if False:
+if False:  # flake8: noqa
     from typing import Dict, Optional, Union, Callable
     from ..language.ast import Document
     from ..type.schema import GraphQLSchema

graphql/backend/cache.py

@@ -4,7 +4,7 @@
 
 from .base import GraphQLBackend
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, Dict, Optional, Union, Tuple, Hashable
     from .base import GraphQLDocument
 

graphql/backend/compiled.py

@@ -1,7 +1,7 @@
 from six import string_types
 from .base import GraphQLDocument
 
-if False:
+if False:  # flake8: noqa
     from ..type.schema import GraphQLSchema
     from typing import Any, Optional, Dict, Callable, Union
 

graphql/backend/core.py

@@ -8,7 +8,7 @@
 
 from .base import GraphQLBackend, GraphQLDocument
 
-if False:
+if False:  # flake8: noqa
     from typing import Any, Optional, Union
     from .base import GraphQLDocument
     from ..language.ast import Document

graphql/backend/decider.py

@@ -1,6 +1,6 @@
 from .base import GraphQLBackend, GraphQLDocument
 
-if False:
+if False:  # flake8: noqa
     from typing import List, Union, Any, Optional
     from ..type.schema import GraphQLSchema
 

graphql/error/base.py

@@ -1,7 +1,7 @@
 import six
 from ..language.location import get_location
 
-if False:
+if False:  # flake8: noqa
     from ..language.source import Source
     from ..language.location import SourceLocation
     from types import TracebackType

graphql/error/format_error.py

@@ -2,7 +2,7 @@
 
 from .base import GraphQLError
 
-if False:
+if False:  # flake8: noqa
     from .base import GraphQLError
     from .located_error import GraphQLLocatedError
     from typing import Any, Dict, Union

graphql/error/located_error.py

@@ -2,7 +2,7 @@
 
 from .base import GraphQLError
 
-if False:
+if False:  # flake8: noqa
     from ..language.ast import Field
     from typing import List, Union
 

graphql/error/syntax_error.py

@@ -1,7 +1,7 @@
 from ..language.location import get_location
 from .base import GraphQLError
 
-if False:
+if False:  # flake8: noqa
     from ..language.source import Source
     from ..language.location import SourceLocation