Fix: remove ignore of reverted deprecation

Author: bsipocz

setup.cfg

@@ -51,7 +51,6 @@ filterwarnings =
     ignore:The alias 'sphinx\.util\.SkipProgressMessage' is deprecated
     ignore:The alias 'sphinx\.util\.progress_message' is deprecated
     ignore:Deprecated call to.*pkg_resources\.declare_namespace:DeprecationWarning
-    ignore:.*suffix for Jinja templates is deprecated
     # pip 23.1 issue:
     ignore:pkg_resources is deprecated as an API:DeprecationWarning