refactor(goal_planner): remove enable_safety_check because it is default

[soblin]

Description

goal_planner never works without PredictedObject, so enable_safety_check is treated as true.

depends #10050

Related links

Parent Issue:

• Link

How was this PR tested?

Psim works

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 28.31%. Comparing base (d63bec2) to head (cd59bbb).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...or_path_goal_planner_module/src/decision_state.cpp	0.00%	9 Missing ⚠️
..._behavior_path_goal_planner_module/src/manager.cpp	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10052      +/-   ##
==========================================
- Coverage   28.32%   28.31%   -0.01%     
==========================================
  Files        1485     1488       +3     
  Lines      111103   111142      +39     
  Branches    43171    43158      -13     
==========================================
  Hits        31468    31468              
- Misses      76614    76652      +38     
- Partials     3021     3022       +1     

Flag	Coverage Δ		*Carryforward flag
differential	0.50% <0.00%> (?)
total	28.34% <ø> (+0.02%)	⬆️	Carriedforward from d63bec2

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