remove useless _list_outputs

Author: salma1601

nipype/interfaces/afni/utils.py

@@ -619,14 +619,6 @@ def _format_arg(self, name, spec, value):
                                             for i in value]))
         return super(CatMatvec, self)._format_arg(name, spec, value)
 
-    def _list_outputs(self):
-        outputs = self.output_spec().get()
-
-        if self.inputs.out_file:
-            outputs['out_file'] = op.abspath(self.inputs.out_file)
-        return outputs
-
-
 class CenterMassInputSpec(CommandLineInputSpec):
     in_file = File(
         desc='input file to 3dCM',