Remove robust_ros3_retry

[CodyCBakerPhD]

Removed the ROS3 retry helper since it is no longer needed

[stephprince]

Looks good to me!

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 78.26087% with 5 lines in your changes missing coverage. Please review.

Project coverage is 84.98%. Comparing base (27e4d25) to head (678374d).
Report is 2 commits behind head on dev.

Files with missing lines	Patch %	Lines
src/nwbinspector/_nwb_inspection.py	77.27%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #506      +/-   ##
==========================================
+ Coverage   79.33%   84.98%   +5.64%     
==========================================
  Files          48       48              
  Lines        1423     1412      -11     
==========================================
+ Hits         1129     1200      +71     
+ Misses        294      212      -82     

Files with missing lines	Coverage Δ
src/nwbinspector/utils/__init__.py	100.00% <ø> (ø)
src/nwbinspector/utils/_utils.py	91.89% <100.00%> (+3.27%)	⬆️
src/nwbinspector/_nwb_inspection.py	83.82% <77.27%> (+4.56%)	⬆️

... and 4 files with indirect coverage changes