Remove try/except around NWBZarrIO

[rly]

Motivation

Fix #241

Checklist

• Did you update CHANGELOG.md with your changes?
• Have you checked our Contributing document?
• Have you ensured the PR clearly describes the problem and the solution?
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• Have you included the relevant issue number using "Fix #XXX" notation where XXX is the issue number? By including "Fix #XXX" you allow GitHub to close issue #XXX when the PR is merged.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 72.22222% with 10 lines in your changes missing coverage. Please review.

Project coverage is 86.65%. Comparing base (8376fe4) to head (96e8cab).

Files with missing lines	Patch %	Lines
src/hdmf_zarr/nwb.py	72.22%	6 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #242      +/-   ##
==========================================
+ Coverage   86.52%   86.65%   +0.12%     
==========================================
  Files           5        5              
  Lines        1210     1206       -4     
  Branches      304      304              
==========================================
- Hits         1047     1045       -2     
+ Misses        104      102       -2     
  Partials       59       59              

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[rly]

The broken HDMF Dev Branch Compatibility workflow now correctly reports:

E   ImportError: cannot import name 'RegionBuilder' from 'hdmf.build' (/opt/hostedtoolcache/Python/3.12.7/x64/lib/python3.12/site-packages/hdmf/build/__init__.py)

with a useful stack trace instead of:

E   ImportError: cannot import name 'NWBZarrIO' from 'hdmf_zarr.nwb' (/opt/hostedtoolcache/Python/3.13.0/x64/lib/python3.13/site-packages/hdmf_zarr/nwb.py)

[oruebel]

If I remember correctly, we wanted to move NWBZarrIO to PyNWB at some point to make the import easier for users and more consistent with NWBHDF5IO