Simplify the handling of "typing.cast"
Simplify the handling of "typing.cast"

pfmoore/pip,rouge8/pip,pypa/pip,pypa/pip,xavfernandez/pip,pradyunsg/pip,pfmoore/pip,rouge8/pip,pradyunsg/pip,xavfernandez/pip,xavfernandez/pip,sbidoul/pip,sbidoul/pip,rouge8/pip