Remove MSVC exclusions in units.h
Remove MSVC exclusions in units.h

hntrmrrs/capnproto,mologie/capnproto,pjulien/capnproto,pjulien/capnproto,mrdomino/capnproto,hntrmrrs/capnproto,jparyani/capnproto,mrdomino/capnproto,mologie/capnproto,mologie/capnproto,hntrmrrs/capnproto,jparyani/capnproto,jparyani/capnproto,pjulien/capnproto,mrdomino/capnproto