...thereby avoiding -Wdeprecated-copy-dtor when the implicitly-declared copy
assignment op is used, but whose non-deleted definition was deprecated because
of the user-provided dtor
Change-Id: I9c4adc4b9ad0634c0afe5a4a707cc3697dbfae32
Reviewed-on: https://gerrit.libreoffice.org/84020
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>