message: Removed kNot as nGraph does not currently support it.
diff: @@ -125,8 +125,6 @@ Status NGraphEmitter::ProcessElementwiseUnary(HloInstruction* hlo,
  ng_op = std::make_shared<ngraph::op::Tanh>(ng_operand);
  break;
  case HloOpcode::kNot:
  - ng_op = std::make_shared<ngraph::op::Not>(ng_operand);
  - break;
  case HloOpcode::kIsFinite:
  case HloOpcode::kReducePrecision:
  default:
  