Remove pytest ordering remnants

[maxnoe]

No description provided.

[codecov]

Codecov Report

Merging #882 (ba35609) into master (5358601) will decrease coverage by 0.14%.
The diff coverage is 95.00%.

@@            Coverage Diff             @@
##           master     #882      +/-   ##
==========================================
- Coverage   85.50%   85.35%   -0.15%     
==========================================
  Files          75       75              
  Lines        5872     5853      -19     
==========================================
- Hits         5021     4996      -25     
- Misses        851      857       +6     

Impacted Files	Coverage Δ
lstchain/io/tests/test_io.py	100.00% <ø> (ø)
lstchain/irf/hdu_table.py	92.18% <ø> (ø)
lstchain/mc/tests/test_senstivity.py	100.00% <ø> (ø)
lstchain/tools/lstchain_create_dl3_index_files.py	77.77% <50.00%> (-11.12%)	⬇️
lstchain/irf/tests/test_hdus.py	100.00% <100.00%> (ø)
lstchain/tests/test_lstchain.py	96.21% <100.00%> (-0.12%)	⬇️
lstchain/tools/tests/test_tools.py	100.00% <100.00%> (ø)

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