fix(autoware_ground_segmentation): remove unused function

[veqcc]

Description

Fixed cppcheck unusedFunction warning

perception/autoware_ground_segmentation/src/scan_ground_filter/grid.hpp:117:0: style: The function 'getPointNum' is never used. [unusedFunction]
  inline int getPointNum() const { return static_cast<int>(point_list_.size()); }

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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 29.49%. Comparing base (90fb05f) to head (9d14479).
Report is 18 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9536      +/-   ##
==========================================
- Coverage   29.50%   29.49%   -0.02%     
==========================================
  Files        1443     1443              
  Lines      108683   108653      -30     
  Branches    41540    41540              
==========================================
- Hits        32067    32044      -23     
+ Misses      73495    73489       -6     
+ Partials     3121     3120       -1     

Flag	Coverage Δ		*Carryforward flag
differential	13.86% <ø> (?)
total	29.49% <ø> (-0.02%)	⬇️	Carriedforward from 41c5956

*This pull request uses carry forward flags. Click here to find out more.

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[badai-nguyen]

LGTM but @technolojin just added this function. Did you have any intention when added it?

[technolojin]

@badai-nguyen It was used during development, but it may removed in finalization. It is good to be removed.

[technolojin]

LGTM

[badai-nguyen]

LGTM