Remove inferior advanced equalizer functionality

[ghost]

The equalizer integrated into the music player is inferior when compared to any other equalizer I can find, and I think that focusing on the main functionality on the player and using the default equalizer used by the user would serve the app by a lot.

[guzz46]

I think the equalizer is the best part of the player, its the only FOSS player I've found that has a 10 band, you don't need to use a third party eq that always runs in the back ground.