Revert "Don't try to copy the file when it already exists"

This reverts commit 0b91533a.

Change-Id: Ic672cca1ba26cd926923632d27ea8bb9a64495b5
Reviewed-on: https://gerrit.libreoffice.org/35758


Reviewed-by: Jan Holesovsky <kendy@collabora.com>
Tested-by: Jan Holesovsky <kendy@collabora.com>