style: resolve linting complaints

export/serializers/people.py

@@ -1,7 +1,5 @@
 import typing
 
-from rest_framework import serializers
-
 from people import models
 
 from . import base

people/models/__init__.py

@@ -1,4 +1,4 @@
-from .organisation import *
-from .person import *
-from .question import *
-from .relationship import *
+from .organisation import *  # noqa
+from .person import *  # noqa
+from .question import *  # noqa
+from .relationship import *  # noqa