diff --git a/conservancy_beancount/rtutil.py b/conservancy_beancount/rtutil.py
index db2a5e2..bc876af 100644
--- a/conservancy_beancount/rtutil.py
+++ b/conservancy_beancount/rtutil.py
@@ -22,13 +22,11 @@ import urllib.parse as urlparse
 import rt
 
 from typing import (
-    Mapping,
     Optional,
     Tuple,
     Union,
 )
 
-AttachmentTuple = Tuple[str, str, str, str]
 RTId = Union[int, str]
 
 class RT: