remove unused variables

ml-agents/mlagents/trainers/tensorflow_to_barracuda.py

     auto_pad = get_attr(layer, "padding")  # layer.attr['padding'].s.decode("utf-8")
     pads = get_attr(layer, "pads")
     strides = get_attr(layer, "strides")  # layer.attr['strides'].list.i
-    # TODO remove?
-    # dilations = get_attr(layer, "dilations")  # layer.attr['dilations'].list.i
     pool_size = get_attr(layer, "ksize")  # layer.attr['ksize'].list.i
     shape = get_attr(layer, "shape")
     starts = get_attr(layer, "starts")
     o_model.layers = cleanup_layers(o_model.layers)
 
     all_inputs = {i for l in o_model.layers for i in l.inputs}
-    # TODO remove?
-    # embedded_tensors = {t.name for l in o_model.layers for t in l.tensors}
 
     # Trim
     if trim_unused_by_output: