No functional changes.
Renaming the following functions
`ANIM_remove_empty_action_from_animdata` and
`ANIM_fcurve_delete_from_animdata`
to
`animdata_remove_empty_action` and
`animdata_fcurve_delete`
The `ANIM` prefix was no longer needed since the code is now in
a namespace. In order to make the function name consistent with
the functions in `fcurve.cc` the thing it modifies is now at the
start of the function name
Pull Request: https://projects.blender.org/blender/blender/pulls/114584