update coverage configs

Author: lonelyenvoy

.coveragerc

@@ -2,6 +2,4 @@
 omit =
     memoization/backport/*
     memoization/util/algorithm_extension_validator.py
-    home/travis/virtualenv/python3.10-dev/lib/python3.10/site-packages/*
-    home/travis/virtualenv/python3.9-dev/lib/python3.9/site-packages/*
-    home/travis/virtualenv/python3.9.0/lib/python3.9/site-packages/*
+    */travis/virtualenv/*