Remove redundant setting of void return of C methods.

tardis/montecarlo/tests/test_cmontecarlo.py

@@ -4,7 +4,7 @@
 import numpy as np
 
 from tardis import __path__ as path
-from tardis.montecarlo.struct import RPacket, StorageModel, RKState
+from tardis.montecarlo.struct import RPacket, StorageModel
 
 test_path = os.path.join(path[0], 'montecarlo', 'test_montecarlo.so')
 tests = CDLL(test_path)
@@ -134,7 +134,6 @@ def test_compute_distance2boundary(packet_params, expected_params, packet, model
     packet.r = packet_params['r']
     packet.recently_crossed_boundary = packet_params['recently_crossed_boundary']
 
-    cmontecarlo_methods.compute_distance2boundary.restype = c_voidp
     cmontecarlo_methods.compute_distance2boundary(byref(packet), byref(model))
 
     np.testing.assert_almost_equal(packet.d_boundary, expected_params['d_boundary'])
@@ -182,7 +181,6 @@ def test_compute_distance2continuum(packet_params, model_params,
     packet.virtual_packet = packet_params['virtual_packet']
     model.cont_status = model_params['cont_status']
 
-    cmontecarlo_methods.compute_distance2continuum.restype = c_voidp
     cmontecarlo_methods.compute_distance2continuum(byref(packet), byref(model))
 
     np.testing.assert_almost_equal(packet.chi_cont, expected_params['chi_cont'])
@@ -217,7 +215,6 @@ def test_increment_j_blue_estimator(packet_params, j_blue_idx, expected, packet,
 
     cmontecarlo_methods.compute_distance2line(byref(packet), byref(model))
     cmontecarlo_methods.move_packet(byref(packet), byref(model), c_double(1.e13))
-    cmontecarlo_methods.increment_j_blue_estimator.restype = c_voidp
     cmontecarlo_methods.increment_j_blue_estimator(byref(packet), byref(model),
                                  c_double(packet.d_line), c_int64(j_blue_idx))