remove case of LindiH5pyFile wrapping h5py.File

[magland]

As discussed with Ryan.

For now this is set to merge into dev5 which contains some other pending PRs. Will switch to base of main once those are merged.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 78.89908% with 23 lines in your changes are missing coverage. Please review.

Project coverage is 83.42%. Comparing base (5cd5d6f) to head (9882980).

Files	Patch %	Lines
...indi/LindiH5pyFile/writers/LindiH5pyGroupWriter.py	41.66%	7 Missing ⚠️
lindi/LindiH5pyFile/LindiH5pyAttributes.py	76.47%	4 Missing ⚠️
lindi/LindiH5pyFile/LindiH5pyGroup.py	87.09%	4 Missing ⚠️
lindi/LindiH5pyFile/LindiH5pyDataset.py	89.65%	3 Missing ⚠️
lindi/LindiH5pyFile/LindiH5pyFile.py	76.92%	3 Missing ⚠️
...di/LindiH5pyFile/writers/LindiH5pyDatasetWriter.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
+ Coverage   82.59%   83.42%   +0.83%     
==========================================
  Files          28       28              
  Lines        2005     1907      -98     
==========================================
- Hits         1656     1591      -65     
+ Misses        349      316      -33     

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