prewin.h handles WB_LEFT and WB_RIGHT already

Change-Id: I73bbd6ae7343257e63210cb4b5cdfd4e9f612122
postwin.h handles OPTIONAL already

Change-Id: Ia04bc545f90a093f70bbd7036b7b9403af15daa1
prewin.h includes windows.h

Change-Id: I221e9f704f75472234a6ce2b09930aeff6279c7a
clean up

nobody uses those switches

Change-Id: Ifbd6563aae901b4f3d931422e6d4e2369aee0573