test(core): Update pytest.ini to remove references to EOL Python versions

Author: chalmerlowe

packages/google-cloud-core/pytest.ini

@@ -7,7 +7,7 @@ filterwarnings =
     # Remove once the minimum supported version of `google-api-core` is 2.15.0
     ignore:.*pkg_resources.declare_namespace:DeprecationWarning
     ignore:.*pkg_resources is deprecated as an API:DeprecationWarning
-    # Remove after support for Python 3.8, 3.9 and/or 3.10+ is dropped # version-scanner: ignore
+    # Remove after support for Python 3.10+ is dropped
     # version-scanner: ignore-next-line
     ignore:\s*You are using a (non-supported )?Python version \(?3\.(8|9|1[0-9]+):DeprecationWarning
     # version-scanner: ignore-next-line