update!: Remove LibreTube

[I-I-IT]

This is being talked about in https://discuss.privacyguides.net/t/remove-unmaintained-libretube/20087

Changes proposed in this PR:

(In discussion) Remove LibreTube as devs don't want to fix the issues.

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[redoomed1]

Marking this PR as a draft because the relevant forum thread is marked as #waiting

[I-I-IT]

This problem is mostly fixed, and the dev is working actively ln fixing future issues. I can close this.