jellyfin-media-player: remove dependency on libcec

[androidnisse]

Summary

• Remove dependency on libcec

Test Plan

• Checked it build.

Checklist

• Package was built and tested against unstable

Packaging notes

• Libcec does not build so removed it here so that it can be deprecated.

[davidjharder]

No, I don' think this is the correct fix.
Not too familiar with jellyfin, but libcec appears to provide support for TV remote adapters. Quite niche, but very fitting for jellyfin

• I assume this is to fix the libcec issue shown on Repo dependency issues flagged by autobuild #4143
• That issue can probably be fixed with a bump to libplatform
• The libplatform build is so old that the pspec does not report the pkgconfig in the "modern" way:

  packages/packages/l/libplatform/pspec_x86_64.xml

  Line 37 in cf5d623

  <Path fileType="data">/usr/lib/pkgconfig/*.pc</Path>

• This causes the autobuild tool to report a false negative

[androidnisse]

No, I don' think this is the correct fix. Not too familiar with jellyfin, but libcec appears to provide support for TV remote adapters. Quite niche, but very fitting for jellyfin

* I assume this is to fix the libcec issue shown on [Repo dependency issues flagged by autobuild #4143](https://github.com/getsolus/packages/issues/4143)

* That issue can probably be fixed with a bump to libplatform

* The libplatform build is so old that the pspec does not report the pkgconfig in the "modern" way: https://github.com/getsolus/packages/blob/cf5d6235d5abfa0ba42d156d0341a85a0b4a02d5/packages/l/libplatform/pspec_x86_64.xml#L37

* This causes the autobuild tool to report a false negative

You are correct. I maintain and use it so that is why I removed it. You would need an adapter like this to be able to use the library https://www.pulse-eight.com/p/104/usb-hdmi-cec-adapter as the p8-platform is old from 2016, I thought it would be better to drop it and libcec then to keep it just for this kinda niche settings.