Silence leak warning on 3.13

De-silence everything older.

pyproject.toml

@@ -131,9 +131,8 @@ addopts = ["-ra", "--strict-markers", "--strict-config"]
 xfail_strict = true
 filterwarnings = [
  "once::Warning",
- "ignore:'cgi' is deprecated:DeprecationWarning:webob.compat:",
- "ignore:Deprecated call to `pkg_resources.declare_namespace:DeprecationWarning:pkg_resources:",
- "ignore:pkg_resources is deprecated:DeprecationWarning:pyramid.asset:",
+ # Silence warning that we're testing for but can't capture..
+ "ignore: coroutine method 'aclose' of 'TestFlask.test_teardown_warns_on_async_on_close.*:RuntimeWarning:",
  # Bug in Starlette 0.37.2: https://github.com/encode/starlette/discussions/2603
  "ignore:Unclosed <MemoryObject(Send|Receive)Stream>:ResourceWarning:anyio.streams.memory",
 ]