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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _clean_output(v):
 """Remove output specific variables to allow variables to be inputs to next steps. """

    out = copy.deepcopy(v)
    outb = out.pop("outputBinding", {})
    if "secondaryFiles" in outb:
        out["secondaryFiles"] = outb["secondaryFiles"]
    return out