elkrem: remove logging statements from tests
elkrem: remove logging statements from tests

This commit removes the logging statements within the elkrem tests as
they become rather spammy when executing on the continuous integration
server.

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