code: def clear_savefile(fname):
      """Remove save files so that tests start fresh."""
      try:
          os.unlink(fname)
      except OSError:
          pass
  
imports: import json
  import os
  import time
  import numpy
  from numpy.testing import assert_allclose
  import pytest
  from lmfit import Parameters
  import lmfit.jsonutils
  from lmfit.lineshapes import gaussian, lorentzian
  from lmfit.model import Model, ModelResult, load_model, load_modelresult, save_model, save_modelresult
  from lmfit.models import ExponentialModel, ExpressionModel, GaussianModel, VoigtModel
label_desc: Use image node_id 1 for calling a global function with example usage: clear_savefile(fname) without return types