Before this change we would pass the Authorization header on to the
download server. This is allowed according to the docs, but on some
onedrive servers this sometimes causes an error with the text
"unauthenticated: Unauthenticated".
This is a similar fix to
dedad9f071d81a2b onedrive: fix "unauthenticated: Unauthenticated" errors when uploading
See: https://forum.rclone.org/t/cryptcheck-on-encrypted-onedrive-personal-failed-with-unauthenticated-error/44581/
aee8d909b3