Fix some pylint warnings

[bachya]

Describe what the PR does:

This PR fixes some pylint warnings about explicit re-raises.

Does this fix a specific issue?

N/A

Checklist:

• Confirm that one or more new tests are written for the new functionality.
• Run tests and ensure everything passes (with 100% test coverage).
• Update README.md and docs/ with any new documentation.
• Add yourself to AUTHORS.md.

[codecov]

Codecov Report

Merging #239 (9a790ea) into dev (d2c46cb) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               dev      #239   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           14        14           
  Lines          716       716           
=========================================
  Hits           716       716           

Impacted Files	Coverage Δ
simplipy/system/__init__.py	100.00% <100.00%> (ø)

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[qlty-cloud-legacy]

Code Climate has analyzed commit 9a790ea and detected 0 issues on this pull request.

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