Remove add_surface_roughness_half test

- The functionality this tested is better tested by the new
  add_surface_roughness_boundaries test

reframe_tests/tests/src/geometry_tests/add_surface_roughness_geometry/add_surface_roughness_half.in

@@ -1,14 +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
-#add_surface_roughness: 0 0 0.1 0.05 0.05 0.1 1 1 1 0.05 0.1 my_soil_box 22
-
-#geometry_objects_write: 0 0 0 0.1 0.1 0.1 full_volume

reframe_tests/tests/test_geometry.py

@@ -22,7 +22,6 @@ class TestAddSurfaceRoughness(GprMaxGeometryTest):
     model = parameter(
         [
             "add_surface_roughness_full",
-            "add_surface_roughness_half",
             "add_surface_roughness_small",
             "add_surface_roughness_weighted",
             "add_surface_roughness_boundaries",
@@ -176,10 +175,6 @@ class TestAddGrassMpi(MpiMixin, TestAddGrass):
 # Depending on the orientation/alignment of the fractal surface, not all
 # MPI decompositions are valid. Therefore create tests that divide the
 # domain in each pair of dimensions.
-# NB: The 'add_surface_roughness_half' test currently fails due to the
-# floating point precision of the fractal surface. Caused by the:
-# if (k < surface.fractalsurface[i - surface.xs, j - surface.ys]):
-# checks in gprMax/user_objects/cmds_geometry/fractal_box.py
 @rfm.simple_test
 class TestAddSurfaceRoughnessMpiYZ(MpiMixin, TestAddSurfaceRoughness):
     tags = {"test", "mpi", "geometery", "fractal", "surface", "roughness"}
@@ -188,7 +183,6 @@ class TestAddSurfaceRoughnessMpiYZ(MpiMixin, TestAddSurfaceRoughness):
     model = parameter(
         [
             "add_surface_roughness_full",
-            # "add_surface_roughness_half",
             "add_surface_roughness_small",
             "add_surface_roughness_weighted",
         ]
@@ -203,7 +197,6 @@ class TestAddSurfaceRoughnessMpiXZ(MpiMixin, TestAddSurfaceRoughness):
     model = parameter(
         [
             "add_surface_roughness_full",
-            # "add_surface_roughness_half",
             "add_surface_roughness_weighted",
             "add_surface_roughness_boundaries",
         ]