old_contents: from .model.fileio import stitch_fitted_results, make_hdf, make_hdf_stitched
  from .model.fit_spectrum import single_pixel_fitting_controller
  #from .model.command_tools import fit_pixel_data_and_save
  
new_contents: from .model.fileio import stitch_fitted_results, make_hdf, make_hdf_stitched
  
subject: clean up api file