I've removed these CLI properties because they were either
unused (:deprecated and :since) or poorly implemented (:stub and
:obsolete). And I'd rather have fewer magical properties, and instead
delegate these roles to the defobsolete! and (new) defstub! macros.
Also, in the future, the help API will ascertain :since dynamically, so
it won't be very useful.
In summary:
- Use defstub! instead of :stub
- Use defobsolete! instead of :obsolete or :deprecated
- This removes the doom-cli-deprecated-error type (it's not really an
error to begin with).
- Removes :stub, :obsolete, :deprecated, and :since
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