Resolve unused parameter warnings

[bmagyar]

Warning: unused parameter ‘response’ [-Wunused-parameter]
 1154 |   std::shared_ptr<controller_manager_msgs::srv::ListHardwareComponents::Response> response)
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
/home/bence/workspaces/ros2-ws/src/ros2_control/controller_manager/src/controller_manager.cpp: In member function ‘void controller_manager::ControllerManager::set_hardware_component_state_srv_cb(std::shared_ptr<controller_manager_msgs::srv::SetHardwareComponentState_Request_<std::allocator<void> > >, std::shared_ptr<controller_manager_msgs::srv::SetHardwareComponentState_Response_<std::allocator<void> > >)’:
/home/bence/workspaces/ros2-ws/src/ros2_control/controller_manager/src/controller_manager.cpp:1195:86: warning: unused parameter ‘response’ [-Wunused-parameter]
 1195 |   std::shared_ptr<controller_manager_msgs::srv::SetHardwareComponentState::Response> response)
      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~

[destogl]

Thanks!