refactor(behavior_path_planner): delete unnecessary TODO

[kyoichi-sugahara]

Description

remove unnecessary TODO
TRYING status doesn't exist anymore

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

Pre-review checklist for the PR author

The PR author must check the checkboxes below when creating the PR.

• I've confirmed the contribution guidelines.
• The PR follows the pull request guidelines.

In-review checklist for the PR reviewers

The PR reviewers must check the checkboxes below before approval.

• The PR follows the pull request guidelines.

Post-review checklist for the PR author

The PR author must check the checkboxes below before merging.

• There are no open discussions or they are tracked via tickets.

After all checkboxes are checked, anyone who has write access can merge the PR.

[codecov]

Codecov Report

Attention: 1958 lines in your changes are missing coverage. Please review.

Comparison is base (765a596) 15.32% compared to head (3427f3c) 8.79%.
Report is 173 commits behind head on main.

Files	Patch %	Lines
...nning/behavior_path_avoidance_module/src/scene.cpp	13.04%	561 Missing and 92 partials ⚠️
...path_avoidance_module/src/shift_line_generator.cpp	12.99%	443 Missing and 66 partials ⚠️
...nning/behavior_path_avoidance_module/src/utils.cpp	3.75%	195 Missing and 10 partials ⚠️
...th_goal_planner_module/src/goal_planner_module.cpp	0.00%	188 Missing ⚠️
...th_avoidance_by_lane_change_module/src/manager.cpp	17.70%	0 Missing and 79 partials ⚠️
...nning/behavior_path_avoidance_module/src/debug.cpp	0.00%	61 Missing ⚠️
...ing/behavior_path_avoidance_module/src/manager.cpp	18.86%	0 Missing and 43 partials ⚠️
...test/test_behavior_path_planner_node_interface.cpp	25.53%	0 Missing and 35 partials ⚠️
...test/test_behavior_path_planner_node_interface.cpp	26.08%	0 Missing and 34 partials ⚠️
..._planner_module/src/default_fixed_goal_planner.cpp	0.00%	34 Missing ⚠️
... and 20 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #5806       +/-   ##
==========================================
- Coverage   15.32%   8.79%    -6.53%     
==========================================
  Files        1721      83     -1638     
  Lines      118559   10926   -107633     
  Branches    37995    4424    -33571     
==========================================
- Hits        18169     961    -17208     
+ Misses      79657    8266    -71391     
+ Partials    20733    1699    -19034     

Flag	Coverage Δ
differential	8.79% <12.47%> (?)
total	?

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[tkhmy]

LGTM