Remove 'fractal_box_half' test

- The functionality this was supposed to test is better covered by the
  new 'fractal_box_boundaries' test

reframe_tests/tests/src/geometry_tests/fractal_box_geometry/fractal_box_half.in

@@ -1,13 +0,0 @@
-#title: Heterogeneous soil using a stochastic distribution of dielectric properties given by a mixing model from Peplinski
-#domain: 0.100 0.100 0.100
-#dx_dy_dz: 0.001 0.001 0.001
-#time_window: 3e-9
-
-#waveform: ricker 1 1.5e9 my_ricker
-#hertzian_dipole: y 0.02 0.02 0.02 my_ricker
-#rx: 0.080 0.080 0.080
-
-#soil_peplinski: 0.5 0.5 2.0 2.66 0.001 0.25 my_soil
-#fractal_box: 0 0 0 0.05 0.05 0.1 1.5 1 1 1 50 my_soil my_soil_box 42
-
-#geometry_objects_write: 0 0 0 0.1 0.1 0.1 full_volume

reframe_tests/tests/test_geometry.py

@@ -132,7 +132,6 @@ class TestFractalBoxGeometry(GprMaxGeometryTest):
     model = parameter(
         [
             "fractal_box_full",
-            "fractal_box_half",
             "fractal_box_small",
             "fractal_box_weighted",
             "fractal_box_boundaries",