fix imports prod

apps/course/views/lesson.py

@@ -1,5 +1,5 @@
 from rest_framework.generics import ListAPIView, RetrieveAPIView, GenericAPIView
-from rest_framework.permissions import IsAuthenticated
+from rest_framework.permissions import IsAuthenticated, AllowAny
 from rest_framework.authentication import TokenAuthentication
 
 from drf_yasg.utils import swagger_auto_schema