feat(google-auth-httplib2): Update Nox sessions to remove old versions

Author: chalmerlowe

packages/google-auth-httplib2/noxfile.py

@@ -34,7 +34,6 @@
 DEFAULT_PYTHON_VERSION = "3.14"
 
 UNIT_TEST_PYTHON_VERSIONS: List[str] = [
-    "3.9",
     "3.10",
     "3.11",
     "3.12",
@@ -57,7 +56,7 @@
 UNIT_TEST_EXTRAS: List[str] = []
 UNIT_TEST_EXTRAS_BY_PYTHON: Dict[str, List[str]] = {}
 
-SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.9"]
+SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.10"]
 SYSTEM_TEST_STANDARD_DEPENDENCIES: List[str] = [
     "mock",
     "pytest",