Update Ireland holidays

KJhellico commented 8 months ago

Proposed change

Update Ireland holidays:

update/add some holidays' years of appearance
remove observed holidays (since the exact day of observed holidays is not established by law)

Closes #1652.

Type of change

[ ] New country/market holidays support (thank you!)
[x] Supported country/market holidays update (calendar discrepancy fix, localization)
[ ] Existing code/documentation/test/process quality improvement (best practice, cleanup, refactoring, optimization)
[ ] Dependency update (version deprecation/upgrade)
[ ] Bugfix (non-breaking change which fixes an issue)
[ ] Breaking change (a code change causing existing functionality to break)
[ ] New feature (new python-holidays functionality in general)

Checklist

[x] I've followed the contributing guidelines
[x] I've run make pre-commit, it didn't generate any changes
[x] I've run make test, all tests passed locally

coveralls commented 8 months ago

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