msvc: Remove unused getopt.h

fix #10
4 jobs for cleanup_contribs in 3 minutes and 56 seconds
Status Job ID Name Coverage
  Build
passed #355660
amd64 debian
build-debian

00:00:45

passed #355661
macos
build-macos

00:01:04

passed #355663
win32 amd64 debian
build-win32

00:01:44

passed #355662
win64 amd64 debian
build-win64

00:01:52