Remove specific sat/byte mining fee range
Remove specific sat/byte mining fee range

These values were no longer accurate and are probably best left out
anyway, as there is fairly complex post-processing that we do to the
BitcoinAverage values to ensure against fee spikes during the trading
window. I'm afraid that attempting to explain this would just make the
passage more difficult for people to deal with. In any case, I can
recall no complaints from users about Bisq's mining fees, outside of
times where mining fees were high for everyone.

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