remove python 3.9 from pep-484 suite on github actions

since the major typing update in f443584
just merged, python 3.9 is failing
for some reason, but 3.9 support w/ 100% mypy is not priority,
just remove from gh actions

Change-Id: Iddc096e51d685a3933a1cdbdb6c47782870973d4

.github/workflows/run-test.yaml

@@ -74,7 +74,6 @@ jobs:
         os:
           - "ubuntu-latest"
         python-version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"