Remove reg_term rom workflow too

Author: ihnorton

nipype/interfaces/mrtrix3/tests/test_auto_FitTensor.py

@@ -32,10 +32,6 @@ def test_FitTensor_inputs():
             position=-1,
             usedefault=True,
         ),
-        reg_term=dict(
-            argstr='-regularisation %f',
-            usedefault=True,
-        ),
     )
     inputs = FitTensor.input_spec()