refactor(trajectory_follower_node): remove unnecessary cmake code

[TakaHoribe]

Description

remove temporary code

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[codecov]

Codecov Report

Base: 11.67% // Head: 11.67% // No change to project coverage 👍

Coverage data is based on head (04ae1d2) compared to base (097228f).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2769   +/-   ##
=======================================
  Coverage   11.67%   11.67%           
=======================================
  Files        1314     1314           
  Lines       91508    91508           
  Branches    24366    24366           
=======================================
  Hits        10679    10679           
  Misses      69679    69679           
  Partials    11150    11150           

Flag	Coverage Δ		*Carryforward flag
differential	27.57% <ø> (?)
total	11.67% <ø> (ø)		Carriedforward from 097228f

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

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