Remove print statements from hdf5eventsource

[maxnoe]

No description provided.

[codecov]

Codecov Report

Merging #1844 (5caf2a2) into master (a50cb82) will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1844      +/-   ##
==========================================
+ Coverage   92.13%   92.17%   +0.03%     
==========================================
  Files         187      187              
  Lines       15060    15058       -2     
==========================================
+ Hits        13876    13879       +3     
+ Misses       1184     1179       -5     

Impacted Files	Coverage Δ
ctapipe/io/hdf5eventsource.py	91.48% <ø> (-0.09%)	⬇️
ctapipe/utils/filelock.py	100.00% <0.00%> (+23.80%)	⬆️

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