message: Don't log
  Reviewers: davidn, jakeh, stephenm, romand
diff: @@ -113,7 +113,7 @@ class PopopsSparseSoftmaxXentWithLogitsOp : public XlaOpKernel, IpuOpKernel {
  : XlaOpKernel(ctx), IpuOpKernel() {}
  void Compile(XlaOpKernelContext* ctx) override {
  - LOG(INFO) << "Using IPU version of SparseSoftmaxXentWithLogitsOp";
  + VLOG(1) << "Using IPU version of SparseSoftmaxXentWithLogitsOp";
  const TensorShape logits_shape = ctx->InputShape(0);
  const TensorShape labels_shape = ctx->InputShape(1);
  