message: Remove Dot now that it is supported through poplibs
diff: @@ -46,7 +46,7 @@ LookupPoplarVertexName(HloOpcode opcode) {
  POPLAR_OPCODE(kCrossReplicaSum, "");
  UNUSED_OPCODE(kCustomCall);
  POPLAR_OPCODE(kDivide, "Div");
  - POPLAR_OPCODE(kDot, "Dot");
  + UNUSED_OPCODE(kDot);
  UNUSED_OPCODE(kDynamicSlice);
  UNUSED_OPCODE(kDynamicUpdateSlice);
  POPLAR_OPCODE(kEq, "EqualTo");
  