fix(autoware_multi_object_tracker): fix clang-diagnostic-unused-private-field (#9491)

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

Author: kobayu858

perception/autoware_multi_object_tracker/src/debugger/debug_object.hpp

@@ -77,7 +77,6 @@ class TrackerObjectDebugger
 
   std::vector<ObjectData> object_data_list_;
   std::list<int32_t> unused_marker_ids_;
-  int32_t marker_id_ = 0;
   std::vector<std::vector<ObjectData>> object_data_groups_;
 
   std::vector<std::string> channel_names_;

perception/autoware_multi_object_tracker/src/processor/input_manager.hpp

@@ -88,7 +88,6 @@ class InputStream
 
   // bool is_time_initialized_{false};
   int initial_count_{0};
-  double expected_interval_{};
   double latency_mean_{};
   double latency_var_{};
   double interval_mean_{};
@@ -130,8 +129,6 @@ class InputManager
   double target_stream_latency_std_{0.04};   // [s]
   double target_stream_interval_{0.1};       // [s]
   double target_stream_interval_std_{0.02};  // [s]
-  double target_latency_{0.2};               // [s]
-  double target_latency_band_{1.0};          // [s]
 
 private:
   void getObjectTimeInterval(