remove earn.com as fee rates source
<FXCollections fx:factory="observableArrayList">
<FeeRatesSource fx:constant="ELECTRUM_SERVER" />
<FeeRatesSource fx:constant="MEMPOOL_SPACE" />
- <FeeRatesSource fx:constant="BITCOINFEES_EARN_COM" />
<FeeRatesSource fx:constant="MINIMUM" />
</FXCollections>
</items>
