STY: Further simplification

Co-authored-by: Chris Markiewicz <[email protected]>

Author: DimitriPapadopoulos

nipype/interfaces/utility/wrappers.py

@@ -95,7 +95,7 @@ def __init__(
         self.inputs.on_trait_change(self._set_function_string, "function_str")
         self._input_names = ensure_list(input_names)
         self._output_names = ensure_list(output_names)
-        add_traits(self.inputs, list(self._input_names))
+        add_traits(self.inputs, self._input_names)
         self.imports = imports
         self._out = {}
         for name in self._output_names: