TST: Updated compatibility matrix

--HG--
branch : default/0.4.3

Author: Michael McNeil Forbes

noxfile.py

@@ -22,9 +22,6 @@ def _has_venv(session):
     ("3.8", "8.2.3"),
     ("3.8", "9.0.4"),
     ("3.9", "4.5.0"),
-    ("3.9", "5.3.0"),
-    ("3.9", "6.1.3"),
-    ("3.9", "7.2.6"),
     ("3.9", "8.2.3"),
     ("3.9", "9.0.4"),
     ("3.10", "8.2.3"),