message: Remove references to contrib in boosted_trees.
diff: @@ -30,9 +30,6 @@ message NodeMetadata {
  // Leaves can either hold dense or sparse information.
  message Leaf {
  oneof leaf {
  - // See third_party/tensorflow/contrib/decision_trees/
  - // proto/generic_tree_model.proto
  - // for a description of how vector and sparse_vector might be used.
  Vector vector = 1;
  SparseVector sparse_vector = 2;
  }
  