Remove unused Protocol import

Andrew Brookins · Andrew Brookins · commit a0f10cc056ed · 2021-11-19T08:10:38.000-08:00
diff --git a/aredis_om/model/model.py b/aredis_om/model/model.py
@@ -15,7 +15,6 @@
     List,
     Mapping,
     Optional,
-    Protocol,
     Sequence,
     Set,
     Tuple,
