Remove obsolete FovVolumeList.detector_limits

[teutoburg]

This was never used anywhere except in testing and is likely a leftover from pre-ScopeSim days.

Came up during #654, but can be treated separately.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.68%. Comparing base (708a08f) to head (1fc1069).
⚠️ Report is 262 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #655      +/-   ##
==========================================
- Coverage   76.69%   76.68%   -0.02%     
==========================================
  Files          70       70              
  Lines        8609     8605       -4     
==========================================
- Hits         6603     6599       -4     
  Misses       2006     2006              

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[teutoburg]

Increased to urgent because this is blocking #654 to avoid conflicts.

[hugobuddel]

Should be fine I think. I suppose this information is still readily available in some other way right?

[teutoburg]

I suppose this information is still readily available in some other way right?

Yes, via the detector header footprint (where it was also extracted from for this).