message: [mlir] drop unused variables in LoadQuantizationRecipe
diff: @@ -144,8 +144,6 @@ void LoadQuantizationRecipe::LoadForLSTMOp(LSTMOp lstm, OpBuilder* builder) {
  region.push_back(new Block);
  builder->setInsertionPointToEnd(&region.front());
  Location loc = lstm.getLoc();
  - Type int32_type = builder->getIntegerType(32);
  - Type int32_tensor = UnrankedTensorType::get(int32_type);
  none_cst = builder->create<ConstantOp>(loc, builder->getNoneType(),
  builder->getUnitAttr());
  