build: rm py semicolons (Python != JavaScript)
Follow-up PR from https://github.com/nodejs/node/pull/29105#pullrequestreview-274819717 that applies Flake8 E703 (no semicolons) to all Python files.
Checklist
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commit message follows commit guidelines
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Follow-up PR from https://github.com/nodejs/node/pull/29105#pullrequestreview-274819717 that applies Flake8 E703 (no semicolons) to all Python files.