message: Remove "tf_op" from XLA:GPU thunk annotation
diff: @@ -95,10 +95,9 @@ void GpuExecutable::ComputeThunkAnnotations() {
  const HloInstruction* hlo = thunk->hlo_instruction();
  CHECK(hlo);
  thunk_annotations_[thunk] =
  - absl::StrFormat("%s:#tf_op=%s:%s,hlo_op=%s,hlo_module=%s#",
  + absl::StrFormat("%s:#hlo_op=%s,hlo_module=%s#",
  hlo->ToStringWithCanonicalNameMap(
  HloPrintOptions::Canonical(), &canonical_name_map),
  - hlo->metadata().op_name(), hlo->metadata().op_type(),
  hlo->name(), hlo->GetModule()->name());
  }
  }
  