Reduce code by refining LyricsWithModels

[georgid]

The LyricsWithModels is not needed for NeuralNEtwork, so Baseclass is used for DNN, add padded silicce method. As result:

• LyricsWithModelsBase is used for DNN. LyricsWithModelsCNN._linkTomodels and
• LyricsWithModelsBase._linkTomodels do not make sense.

maybe remove lyrics With models in general.

then reduce if statement in SecionLink.loadSmallAudioFragment()