remove debian10 and 11 packaging #1406

Job	Run time
Python 3.7 on ubuntu-20.04 PyQt5 sdist	6m 3s
Python 3.7 on ubuntu-20.04 PyQt5 sdist	6m 3s
Python 3.10 on macos-latest PyQt5 wheel	6m 58s
Python 3.10 on macos-latest PyQt5 wheel	6m 58s
Python 3.8 on ubuntu-latest PySide6 sdist	5m 33s
Python 3.8 on ubuntu-latest PySide6 sdist	5m 33s
Python 3.9 on macos-latest PySide6 wheel	7m 48s
Python 3.9 on macos-latest PySide6 wheel	8m 46s
Python 3.11 on ubuntu-latest PyQt6 wheel	5m 27s
Python 3.11 on ubuntu-latest PyQt6 wheel	5m 27s
Python 3.10 on macos-latest PyQt6 wheel	8m 8s
Python 3.10 on macos-latest PyQt6 wheel	8m 20s
Python 3.9 on windows-latest No GUI wheel	5m 43s
Python 3.9 on windows-latest No GUI wheel	5m 43s
	1h 32m 30s

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