lnwallet: remove unused struct
lnwallet: remove unused struct

LightningNetwork/lnd,ddustin/lnd,aakselrod/lnd,ddustin/lnd,BitfuryLightning/lnd,BitfuryLightning/lnd,aakselrod/lnd,AndrewSamokhvalov/lnd,LightningNetwork/lnd,bryanvu/lnd,AndrewSamokhvalov/lnd,bryanvu/lnd