remove test-cases too large for nightly testing

benchmarks/3d_large/magnetron/magnetron0.geo

benchmarks/3d_large/magnetron/magnetron1-full.geo

benchmarks/3d_large/magnetron/magnetron1.geo

benchmarks/3d_large/magnetron/magnetron2-full.geo

benchmarks/3d_large/magnetron/magnetron2.geo

benchmarks/3d_large/magnetron/quacylin.geo

benchmarks/3d_large/magnetron/traphedre1.geo

benchmarks/3d_large/magnetron/traphedre2.geo

benchmarks/3d_large/many_surfaces.geo

benchmarks/3d_large/plate_extrude.geo

benchmarks/3d_large/plate_notextrude.geo

benchmarks/3d_large/spheremodel.geo

benchmarks/3d_large/submarine/partition.script

benchmarks/3d_large/submarine/split.script

benchmarks/3d_large/submarine/submarine.stp

benchmarks/3d_large/submarine/submarine_simple.geo

benchmarks/3d_large/submarine_hex/Submarine.geo

benchmarks/3d_large/submarine_hex/Submarine.stp

benchmarks/3d_large/submarine_hex/optimize.py

benchmarks/3d_large/submarine_hex/preprofix.py