providers/*: fix api linting issues

authentik/core/api/providers.py

@@ -1,5 +1,4 @@
 """Provider API Views"""
-from rest_framework.fields import ReadOnlyField
 from rest_framework.serializers import ModelSerializer, SerializerMethodField
 from rest_framework.viewsets import ModelViewSet
 

authentik/providers/proxy/api.py

@@ -1,6 +1,11 @@
 """ProxyProvider API Views"""
 from drf_yasg2.utils import swagger_serializer_method
-from rest_framework.fields import CharField, ListField, ReadOnlyField, SerializerMethodField
+from rest_framework.fields import (
+    CharField,
+    ListField,
+    ReadOnlyField,
+    SerializerMethodField,
+)
 from rest_framework.request import Request
 from rest_framework.response import Response
 from rest_framework.serializers import ModelSerializer, Serializer

authentik/providers/saml/api.py

@@ -1,8 +1,6 @@
 """SAMLProvider API Views"""
-from typing import Optional
-from authentik.core.models import Application
-from rest_framework.fields import ReadOnlyField, SerializerMethodField
-from rest_framework.serializers import ModelSerializer, Serializer, CharField
+from rest_framework.fields import ReadOnlyField
+from rest_framework.serializers import ModelSerializer
 from rest_framework.viewsets import ModelViewSet
 
 from authentik.core.api.utils import MetaNameSerializer