message: embedding_lookup_sparse documentation change.
  Remove "(typically from FeatureValueToId)" from args descriptions.
  This appears to have been an obsolete reference from an ancestor
  implementation.
diff: @@ -331,8 +331,8 @@ def embedding_lookup_sparse(params,
  representing sharded embedding tensors. Alternatively, a
  `PartitionedVariable`, created by partitioning along dimension 0. Each
  element must be appropriately sized for the given `partition_strategy`.
  - sp_ids: N x M `SparseTensor` of int64 ids (typically from FeatureValueToId),
  - where N is typically batch size and M is arbitrary.
  + sp_ids: N x M `SparseTensor` of int64 ids where N is typically batch size
  + and M is arbitrary.
  sp_weights: either a `SparseTensor` of float / double weights, or `None` to
  indicate all weights should be taken to be 1. If specified, `sp_weights`
  must have exactly the same shape and indices as `sp_ids`.
  