hit: remove unused variable
hit: remove unused variable

Remove unused variable introduced in #10371.

jessecarterMOOSE/moose,dschwen/moose,SudiptaBiswas/moose,lindsayad/moose,lindsayad/moose,YaqiWang/moose,friedmud/moose,lindsayad/moose,jessecarterMOOSE/moose,milljm/moose,jessecarterMOOSE/moose,permcody/moose,milljm/moose,dschwen/moose,friedmud/moose,nuclear-wizard/moose,laagesen/moose,dschwen/moose,laagesen/moose,jessecarterMOOSE/moose,idaholab/moose,laagesen/moose,dschwen/moose,permcody/moose,YaqiWang/moose,dschwen/moose,harterj/moose,bwspenc/moose,lindsayad/moose,friedmud/moose,harterj/moose,harterj/moose,nuclear-wizard/moose,sapitts/moose,andrsd/moose,YaqiWang/moose,nuclear-wizard/moose,idaholab/moose,jessecarterMOOSE/moose,SudiptaBiswas/moose,idaholab/moose,lindsayad/moose,nuclear-wizard/moose,bwspenc/moose,SudiptaBiswas/moose,andrsd/moose,bwspenc/moose,sapitts/moose,harterj/moose,permcody/moose,sapitts/moose,sapitts/moose,andrsd/moose,bwspenc/moose,milljm/moose,harterj/moose,SudiptaBiswas/moose,milljm/moose,idaholab/moose,permcody/moose,SudiptaBiswas/moose,YaqiWang/moose,milljm/moose,bwspenc/moose,idaholab/moose,sapitts/moose,friedmud/moose,laagesen/moose,laagesen/moose,andrsd/moose,andrsd/moose