message: Removes redundant variable assignment
  Addresses alert raised by lgtm.com:
diff: @@ -59,7 +59,6 @@ def _eager_reshape(tensor, shape, ctx):
  attr_t = tensor._datatype_enum() # pylint: disable=protected-access
  attr_tshape, (shape,) = execute.args_to_matching_eager(
  [shape], ctx, dtypes.int32)
  - attr_tshape = attr_tshape
  inputs_flat = [tensor, shape]
  attrs = ("T", attr_t, "Tshape", attr_tshape)
  result, = execute.execute(
  