Remove a couple of redundant commas
Remove a couple of redundant commas

Mypy complains about this once the function is typed:

src/_pytest/main.py:85: error: "_addoption" of "OptionGroup" does not return a value
src/_pytest/main.py:133: error: "addoption" of "OptionGroup" does not return a value

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