VLCMediaPlayer: remove idleTimer control

VLC 4.0 now has an inhibiter module for UIKit and doesn't need the idleTimer control. In addition, the control was using libVLC methods from the callback, enforcing dispatch_async to be used.

changed milestone to %4.0

added Maintenance iOS labels

approved this merge request

added 14 commits

• 57b8fc90...80cb351c - 13 commits from branch videolan:master
• b7d393d2 - VLCMediaPlayer: remove idleTimer control

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enabled an automatic merge when the pipeline for b7d393d2 succeeds

merged