monitor: remove unused variable
monitor: remove unused variable

mslovy/barrelfish,kishoredbn/barrelfish,utsav2601/cmpe295A,BarrelfishOS/barrelfish,linusyang/barrelfish,mslovy/barrelfish,utsav2601/cmpe295A,kishoredbn/barrelfish,8l/barrelfish,kishoredbn/barrelfish,kishoredbn/barrelfish,8l/barrelfish,linusyang/barrelfish,8l/barrelfish,mslovy/barrelfish,linusyang/barrelfish,8l/barrelfish,utsav2601/cmpe295A,mslovy/barrelfish,BarrelfishOS/barrelfish,BarrelfishOS/barrelfish,8l/barrelfish,BarrelfishOS/barrelfish,BarrelfishOS/barrelfish,BarrelfishOS/barrelfish,BarrelfishOS/barrelfish,8l/barrelfish,BarrelfishOS/barrelfish,mslovy/barrelfish,utsav2601/cmpe295A,BarrelfishOS/barrelfish,linusyang/barrelfish,linusyang/barrelfish,kishoredbn/barrelfish,utsav2601/cmpe295A,kishoredbn/barrelfish,utsav2601/cmpe295A,mslovy/barrelfish