Remove unused styles from TTML test data
Remove unused styles from TTML test data

PiperOrigin-RevId: 288862795

stari4ek/ExoPlayer,stari4ek/ExoPlayer,ened/ExoPlayer,ened/ExoPlayer,amzn/exoplayer-amazon-port,androidx/media,google/ExoPlayer,androidx/media,google/ExoPlayer,amzn/exoplayer-amazon-port,ened/ExoPlayer,androidx/media,amzn/exoplayer-amazon-port,stari4ek/ExoPlayer,google/ExoPlayer