feat(v3): simplify the project to contain only required tools

backend/processing/views.py

@@ -11,6 +11,7 @@ from .services import (
     image_session_create,
     image_session_process,
     image_state_apply_operation,
+    image_state_delete,
     image_state_payload,
     image_states_payload,
     processing_job_payload,
@@ -105,6 +106,18 @@ class StateOperationView(APIView):
             return error_response(str(exc), code)
 
 
+class StateDetailView(APIView):
+    def delete(self, request, state_id):
+        state = image_state_get(state_id=state_id)
+        if state is None:
+            return error_response("Image state does not exist.", status.HTTP_404_NOT_FOUND)
+        try:
+            image_state_delete(state=state)
+            return Response(status=status.HTTP_204_NO_CONTENT)
+        except ProcessingError as exc:
+            return error_response(str(exc))
+
+
 class StateCombineView(APIView):
     class InputSerializer(serializers.Serializer):
         operation = serializers.ChoiceField(choices=["add", "subtract", "dot_product", "average", "and", "or"])