message: fix CI for ConvertUnpackOpDynamic
diff: @@ -5100,6 +5100,8 @@ class ConvertUnpackOpDynamic : public OpRewritePattern<TF::UnpackOp> {
  PatternRewriter& rewriter) const override {
  auto value_type = op.value().getType().dyn_cast<RankedTensorType>();
  if (!value_type) return failure();
  + // TODO: Remove this constraint once fold and canonicalization implemented.
  + if (value_type.hasStaticShape()) return failure();
  int64_t value_rank = value_type.getRank();
  int64_t axis = op.axis();
  