o2-sim: Avoid duplicate printout of detector list

[sawenzel]

No description provided.

[github-actions]

REQUEST FOR PRODUCTION RELEASES:
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The following labels are available
async-2023-pbpb-apass4
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async-2024-PbPb-apass1
async-2024-ppRef-apass1
async-2024-PbPb-apass2
async-2023-PbPb-apass5

[alibuild]

Error while checking build/O2/fullCI_slc9 for a22d41b at 2025-11-23 18:23:

## sw/BUILD/O2-latest/log
CMake Error at /sw/slc9_x86-64/CMake/v3.31.6-6/share/cmake-3.31/Modules/FindPackageHandleStandardArgs.cmake:233 (message):

Full log here.