Closed Captions track can not be disabled

How can I disable the CC track? mpv seems to add this by itself. However, it seems to be empty anyway (at least it does not display anything) and I don't need or want it. There should be a way to completely disable that "feature".

Thanks!

Important Information

Provide following Information:

• 0.33.1
• Windows 10

Reproduction steps

Play a video that seems to include CC information. mpv automatically adds an "eia_608" subtitle track.

Expected behavior

The automatic creation of the track should be configurable. I.e. it should be possible to deactivate it completely.
The option "sub-create-cc-track" should be improved, so that it allows for disabling the cc feature. Like:

sub-create-cc-track = < no | yes | auto >

no = disable cc decoding (never add a subtitle track)
yes = always add a cc track (even if no cc info is found at the beginning) - like it works now
auto = add cc track on the fly - like "no" works currently

Actual behavior

cc track creating can not be prevented.

Start with the sub-create-cc-track option and trace how mpv creates the eia_608 subtitle track when playing a video with CC information. Review the existing behavior described in the reproduction steps, then determine how the proposed no, yes, and auto modes should behave. Done means CC track creation can be disabled without affecting the other modes.