Clean up thermal edge flow case

examples/thermal_edge_flow/archive/beamchamber_hybrid.geo

...s/thermal_edge_flow/archive/beamchamber_hybrid_curved.geo

...ples/thermal_edge_flow/archive/beamchamber_structured.geo

...hermal_edge_flow/archive/beamchamber_structured_old_1.geo

...hermal_edge_flow/archive/beamchamber_structured_old_2.geo

...hermal_edge_flow/archive/beamchamber_structured_split.geo

...es/thermal_edge_flow/archive/beamchamber_unstructured.geo

...edge_flow/archive/beamchamber_unstructured_nonuniform.geo

...ge_flow/archive/beamchamber_unstructured_nonuniform_2.geo

...ge_flow/archive/beamchamber_unstructured_nonuniform_3.geo

examples/thermal_edge_flow/archive/create_mesh1.sh

examples/thermal_edge_flow/archive/create_mesh10.sh

examples/thermal_edge_flow/archive/create_mesh11.sh

examples/thermal_edge_flow/archive/create_mesh12.sh

examples/thermal_edge_flow/archive/create_mesh13.sh

examples/thermal_edge_flow/archive/create_mesh2.sh

examples/thermal_edge_flow/archive/create_mesh3.sh

examples/thermal_edge_flow/archive/create_mesh4.sh

examples/thermal_edge_flow/archive/create_mesh5.sh

examples/thermal_edge_flow/archive/create_mesh6.sh