Remove unused 'Leftover' bin for flow regime maps.
Remove unused 'Leftover' bin for flow regime maps.

When designing the flow regime maps, we included a 'leftover' bin to flag using the original
closure while the TRACE closure was still being implemented.  This method has been
superseeded.  This update removes the bin on the 4 flow regime maps,  and fixes the
flow regime test input to not printout the nonexistent bin.
Ref idaholab/relap-7#19688
dschwen/moose,lindsayad/moose,dschwen/moose,bwspenc/moose,idaholab/moose,lindsayad/moose,andrsd/moose,andrsd/moose,jessecarterMOOSE/moose,milljm/moose,lindsayad/moose,laagesen/moose,laagesen/moose,harterj/moose,andrsd/moose,harterj/moose,andrsd/moose,lindsayad/moose,laagesen/moose,sapitts/moose,milljm/moose,idaholab/moose,idaholab/moose,harterj/moose,sapitts/moose,lindsayad/moose,jessecarterMOOSE/moose,jessecarterMOOSE/moose,dschwen/moose,sapitts/moose,bwspenc/moose,jessecarterMOOSE/moose,dschwen/moose,bwspenc/moose,harterj/moose,andrsd/moose,dschwen/moose,sapitts/moose,milljm/moose,bwspenc/moose,bwspenc/moose,milljm/moose,sapitts/moose,milljm/moose,idaholab/moose,jessecarterMOOSE/moose,harterj/moose,laagesen/moose,laagesen/moose,idaholab/moose