code: def read_raster_no_crs(input_file, indexes=None, gdal_opts=None):
      
      with warnings.catch_warnings():
          warnings.simplefilter("ignore")
          try:
              with rasterio.Env(
                  **get_gdal_options(
                      gdal_opts, is_remote=path_is_remote(input_file, s3=True)
                  )
              ):
                  with rasterio.open(input_file, "r") as src:
                      return src.read(indexes=indexes, masked=True)
          except RasterioIOError as e:
              for i in ("does not exist in the file system", "No such file or directory"):
                  if i in str(e):
                      raise FileNotFoundError("%s not found" % input_file)
              else:
                  raise
docs: Wrapper function around rasterio.open().read().
  
      Parameters
      ----------
      input_file : str
          Path to file
      indexes : int or list
          Band index or list of band indexes to be read.
  
      Returns
      -------
      MaskedArray
  
      Raises
      ------
      FileNotFoundError if file cannot be found.