Creating, then deleting all keys on a property (ex: transform) in the "Dopesheet" removes all keys AND property from clip.

Doing the exact same thing in the Curves view always leaves 1 key per property (these keys and the property can be deleted in the dopesheet)

repro:
create cube
create clip
transform cube to create keys
select drag select all keys in the Curves view and hit delete on the keyboard... the first keys don't get deleted.
switch to the dopesheet tab, select keys, delete... all gone!
see attached gif