[MAINTENANCE] Clean up top-level conftest.py

[cdkini]

• Description of PR changes above includes a link to an existing GitHub issue
• PR title is prefixed with one of: [BUGFIX], [FEATURE], [DOCS], [MAINTENANCE], [CONTRIB]
• Code is linted - run invoke lint (uses ruff format + ruff check)
• Appropriate tests and docs have been updated

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.31%. Comparing base (221c7e9) to head (fcf3629).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #10014   +/-   ##
========================================
  Coverage    79.31%   79.31%           
========================================
  Files          456      456           
  Lines        38928    38928           
========================================
  Hits         30876    30876           
  Misses        8052     8052           

Flag	Coverage Δ
3.10	65.68% <ø> (ø)
3.11	65.68% <ø> (+0.01%)	⬆️
3.11 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	54.33% <ø> (ø)
3.11 aws_deps	45.54% <ø> (ø)
3.11 big	54.42% <ø> (ø)
3.11 databricks	46.69% <ø> (ø)
3.11 filesystem	60.23% <ø> (ø)
3.11 mssql	49.72% <ø> (ø)
3.11 mysql	49.78% <ø> (ø)
3.11 postgresql	54.00% <ø> (ø)
3.11 snowflake	47.36% <ø> (+<0.01%)	⬆️
3.11 spark	57.26% <ø> (ø)
3.11 trino	51.87% <ø> (ø)
3.8	65.69% <ø> (-0.02%)	⬇️
3.8 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	54.34% <ø> (ø)
3.8 aws_deps	45.56% <ø> (ø)
3.8 big	54.43% <ø> (ø)
3.8 databricks	46.71% <ø> (ø)
3.8 filesystem	60.25% <ø> (ø)
3.8 mssql	49.71% <ø> (ø)
3.8 mysql	49.77% <ø> (ø)
3.8 postgresql	53.99% <ø> (ø)
3.8 snowflake	47.38% <ø> (+<0.01%)	⬆️
3.8 spark	57.23% <ø> (ø)
3.8 trino	51.86% <ø> (ø)
3.9	65.70% <ø> (+0.01%)	⬆️
cloud	0.00% <ø> (ø)
docs-basic	48.56% <ø> (ø)
docs-creds-needed	49.63% <ø> (ø)
docs-spark	48.43% <ø> (ø)

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