This commit removes `AppSettings::DisableVersionForSubcommand` as it's
now a moot setting with clap's default functionality of not building a
version flag unless there actually exists version information.
`clap_up` must still be changed to remove this variant instead of the
current configuration to simply rename the variant.
In #2270, its brought up to solve this at the `cargo workspace publish`
level. However, copying the files is a 5s fix without any design work,
it doesn't seem like support within an external tool should block us
from getting this fix into users hands. Once `cargo workspace publish`
supports this and if we are still using it, we can re-evaluate.
Fixes#2270
