fix(autoware_pointcloud_preprocessor): fix unreadVariable

[kobayu858]

Description

This is a fix based on cppcheck unreadVariable warnings.

sensing/autoware_pointcloud_preprocessor/src/distortion_corrector/distortion_corrector.cpp:234:23: style: Variable 'is_twist_valid' is assigned a value that is never used. [unreadVariable]
  bool is_twist_valid = true;
                      ^

sensing/autoware_pointcloud_preprocessor/src/distortion_corrector/distortion_corrector.cpp:235:21: style: Variable 'is_imu_valid' is assigned a value that is never used. [unreadVariable]
  bool is_imu_valid = true;
                    ^

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.

[github-actions]

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[vividf]

LGTM!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 19.42%. Comparing base (a5d77b4) to head (de22b6a).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8370      +/-   ##
==========================================
- Coverage   23.73%   19.42%   -4.31%     
==========================================
  Files        1378      135    -1243     
  Lines      101354     9240   -92114     
  Branches    38503     3645   -34858     
==========================================
- Hits        24057     1795   -22262     
+ Misses      74828     7243   -67585     
+ Partials     2469      202    -2267     

Flag	Coverage Δ
differential	19.42% <100.00%> (?)
total	?

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