fix(autoware_interpolation): remove clang compiler error

[veqcc]

Description

Fixed clang complier error

--- stderr: autoware_interpolation                               
/home/veqcc/work/autoware/src/universe/autoware.universe/common/autoware_interpolation/test/src/test_interpolation_utils.cpp:21:18: error: unused variable 'epsilon' [-Werror,-Wunused-const-variable]
constexpr double epsilon = 1e-6;
                 ^
1 error generated.
gmake[2]: *** [CMakeFiles/test_interpolation.dir/build.make:90: CMakeFiles/test_interpolation.dir/test/src/test_interpolation_utils.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:185: CMakeFiles/test_interpolation.dir/all] Error 2
gmake: *** [Makefile:146: all] Error 2
---
Failed   <<< autoware_interpolation [0.92s, exited with code 2]

Related links

Parent Issue:

• Link

How was this PR tested?

build and test

$ colcon build --symlink-install --cmake-args -DCMAKE_BUILD_TYPE=Release --packages-up-to autoware_interpolation
Starting >>> autoware_planning_msgs
Starting >>> autoware_common_msgs
Starting >>> autoware_lint_common
Starting >>> autoware_perception_msgs
Starting >>> autoware_internal_msgs
Starting >>> tier4_debug_msgs
Finished <<< autoware_lint_common [0.26s]                                                                                                                                                   
Starting >>> autoware_cmake
Finished <<< autoware_cmake [0.28s]                                                                                                                                                           
Finished <<< autoware_common_msgs [1.45s]                                                                                                                                                        
Finished <<< autoware_internal_msgs [1.47s]
Finished <<< tier4_debug_msgs [1.48s]                                                                                                                 
Finished <<< autoware_perception_msgs [1.73s]                                                                            
Finished <<< autoware_planning_msgs [1.77s]
Starting >>> autoware_vehicle_msgs
Starting >>> tier4_planning_msgs
Finished <<< autoware_vehicle_msgs [1.97s]                                                                     
Finished <<< tier4_planning_msgs [2.44s]                      
Starting >>> autoware_universe_utils
Finished <<< autoware_universe_utils [2.01s]                     
Starting >>> autoware_interpolation
Finished <<< autoware_interpolation [2.03s]                    

Summary: 11 packages finished [9.76s]

$ colcon test --packages-select autoware_interpolation
Starting >>> autoware_interpolation
Finished <<< autoware_interpolation [2.54s]          

Summary: 1 package finished [4.03s]

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.79%. Comparing base (9bc173c) to head (fa4edda).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9711      +/-   ##
==========================================
+ Coverage   29.74%   29.79%   +0.04%     
==========================================
  Files        1444     1445       +1     
  Lines      108693   108703      +10     
  Branches    42665    42665              
==========================================
+ Hits        32336    32383      +47     
+ Misses      73175    73132      -43     
- Partials     3182     3188       +6     

Flag	Coverage Δ		*Carryforward flag
differential	30.33% <ø> (?)
total	29.74% <ø> (ø)		Carriedforward from 8949358

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

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