fix(behavior_velocity): occlusion spot partition

[taikitanaka3]

Description

• fix unused member variables

• make sure close_partition_ is not used

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[codecov]

Codecov Report

Merging #608 (9bb3468) into main (ca59048) will decrease coverage by 4.94%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##             main    #608      +/-   ##
=========================================
- Coverage   10.76%   5.81%   -4.95%     
=========================================
  Files         712      68     -644     
  Lines       50569    5053   -45516     
  Branches     6572     545    -6027     
=========================================
- Hits         5445     294    -5151     
+ Misses      40717    4596   -36121     
+ Partials     4407     163    -4244     

Impacted Files	Coverage Δ
...ene_module/occlusion_spot/scene_occlusion_spot.cpp	0.00% <0.00%> (ø)
sensing/imu_corrector/src/imu_corrector_core.cpp
...nal_processing/test/src/lowpass_filter_1d_test.cpp
...er/src/scene_module/pull_over/pull_over_module.cpp
...ction_by_tracker/src/detection_by_tracker_core.cpp
...include/tier4_autoware_utils/system/stop_watch.hpp
...ude/freespace_planning_algorithms/astar_search.hpp
...ject_tracker/src/tracker/model/bicycle_tracker.cpp
common/osqp_interface/test/test_osqp_interface.cpp
...eespace_planning_algorithms/abstract_algorithm.hpp
... and 635 more

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[0x126]

LGTM