Remove checks for unsupported Java version from unit tests

[valfirst]

Checklist

• Read the contributing guide
• PR should be motivated, i.e. what does it fix, why, and if relevant how
• If possible / relevant include an example in the description, that could help all readers
  including project members to get a better picture of the change
• Avoid other runtime dependencies
• Meaningful commit history ; intention is important please rebase your commit history so that each
  commit is meaningful and help the people that will explore a change in 2 years
• The pull request follows coding style
• Mention Fixes #<issue number> in the description if relevant
• At least one commit should mention Fixes #<issue number> if relevant

[codecov-commenter]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (e736992) 85.53% compared to head (09de60e) 85.53%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #3150   +/-   ##
=========================================
  Coverage     85.53%   85.53%           
  Complexity     2912     2912           
=========================================
  Files           333      333           
  Lines          8856     8856           
  Branches       1095     1095           
=========================================
  Hits           7575     7575           
  Misses          993      993           
  Partials        288      288           

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[TimvdLippe]

Thanks!