fix(qp_interface): fix unreadVariable (#8349)

* fix:unreadVariable

Signed-off-by: kobayu858 <yutaro.kobayashi@tier4.jp>

* fix:unreadVariable

Signed-off-by: kobayu858 <yutaro.kobayashi@tier4.jp>

* fix:unreadVariable

Signed-off-by: kobayu858 <yutaro.kobayashi@tier4.jp>

---------

Signed-off-by: kobayu858 <yutaro.kobayashi@tier4.jp>

Author: kobayu858

common/qp_interface/src/osqp_interface.cpp

@@ -354,9 +354,7 @@ std::vector<double> OSQPInterface::optimizeImpl()
   osqp_solve(work_.get());
 
   double * sol_x = work_->solution->x;
-  double * sol_y = work_->solution->y;
   std::vector<double> sol_primal(sol_x, sol_x + param_n_);
-  std::vector<double> sol_lagrange_multiplier(sol_y, sol_y + data_->m);
 
   latest_work_info_ = *(work_->info);