fix(autoware_image_projection_based_fusion): fix unusedFunction

[kobayu858]

Description

This is a fix based on cppcheck unusedFunction warnings.

perception/autoware_image_projection_based_fusion/src/utils/utils.cpp:51:0: style: The function 'convertCluster2FeatureObject' is never used. [unusedFunction]
void convertCluster2FeatureObject(
^

perception/autoware_image_projection_based_fusion/src/utils/utils.cpp:177:0: style: The function 'addShapeAndKinematic' is never used. [unusedFunction]
void addShapeAndKinematic(
^

perception/autoware_image_projection_based_fusion/src/utils/utils.cpp:264:0: style: The function 'getClosestPoint' is never used. [unusedFunction]
pcl::PointXYZ getClosestPoint(const pcl::PointCloud<pcl::PointXYZ> & cluster)
^

Related links

Parent Issue:

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How was this PR tested?

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 23.96%. Comparing base (a7db560) to head (1d3406a).
Report is 24 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8567   +/-   ##
=======================================
  Coverage   23.96%   23.96%           
=======================================
  Files        1382     1383    +1     
  Lines      102019   101969   -50     
  Branches    38886    38858   -28     
=======================================
- Hits        24446    24439    -7     
+ Misses      75141    75102   -39     
+ Partials     2432     2428    -4     

Flag	Coverage Δ		*Carryforward flag
differential	2.99% <ø> (?)
total	23.96% <ø> (+<0.01%)	⬆️	Carriedforward from a7db560

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[ktro2828]

@badai-nguyen Could you confirm if it is OK to remove these functions you implemented?

[badai-nguyen]

LGTM