remove container after gathering logs

otter/grade/containers.py

@@ -180,7 +180,6 @@ def grade_submission(
             image,
             command=["/autograder/run_autograder"],
             networks=["none"] if not network else [],
-            remove=True,
         )
 
         for local_path, container_path in volumes:
@@ -212,6 +211,9 @@ def kill_container():
         logs = docker.container.logs(container)
         LOGGER.debug(f"Container {container_id} logs:\n{indent(logs, '    ')}")
 
+        docker.container.remove(container)
+        LOGGER.debug(f"Removed container {container_id}")
+
         # Close our file handles since docker cp will delete the original file when performing the
         # copy.
         os.close(temp_subm_file)