fixup! tox.ini: clean up filterwarnings
fixup! tox.ini: clean up filterwarnings

Akasurde/pytest,The-Compiler/pytest,pytest-dev/pytest,markshao/pytest,nicoddemus/pytest,tomviner/pytest,alfredodeza/pytest,The-Compiler/pytest,nicoddemus/pytest,RonnyPfannschmidt/pytest,tomviner/pytest