actually stop running tests against 3.9

.github/workflows/backend_tests.yml

@@ -19,7 +19,6 @@ jobs:
           - { python: "3.11", os: "ubuntu-latest", session: "safety" }
           - { python: "3.11", os: "ubuntu-latest", session: "mypy" }
           - { python: "3.10", os: "ubuntu-latest", session: "mypy" }
-          - { python: "3.9", os: "ubuntu-latest", session: "mypy" }
           - {
               python: "3.11",
               os: "ubuntu-latest",
@@ -44,12 +43,6 @@ jobs:
               session: "tests",
               database: "sqlite",
             }
-          - {
-              python: "3.9",
-              os: "ubuntu-latest",
-              session: "tests",
-              database: "sqlite",
-            }
           # FIXME: tests cannot pass on windows and we currently cannot debug
           # since none of us have a windows box that can run the python app.
           # so ignore windows tests until we can get it fixed.

spiffworkflow-backend/pyproject.toml

@@ -160,6 +160,7 @@ explicit_package_bases = false
 select = [
   "B",   # flake8-bugbear
   "E",   # pycodestyle error
+  # "ERA",  # eradicate
   "F",   # pyflakes
   # "N",   # pep8-naming
   # "PL",  # pylint