Make unrealized `SingleQubitQPDGate` have definition of `None` rather than raise error #1737

	name: Styles check

	on:
	push:
	branches:
	- main
	- 'stable/**'
	pull_request:
	branches:
	- main
	- 'stable/**'

	jobs:
	lint:
	runs-on: ubuntu-latest
	timeout-minutes: 30
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Set up Python 3.9
	uses: actions/setup-python@v4
	with:
	python-version: '3.9'
	- name: Install tox
	run: \|
	python -m pip install --upgrade pip
	pip install tox
	- name: Run styles check
	shell: bash
	run: \|
	tox -elint

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