STYLE: Remove dead RabbitCT code #1154

Job	Run time
python-build-workflow / build-linux-py (11, _2_28-x64)	30m 36s
cxx-build-workflow / build-test-cxx (ubuntu-22.04)	28m 44s
python-build-workflow / build-linux-py (11, 2014-x64)	30m 31s
cxx-build-workflow / build-test-cxx (windows-2022)	32m 15s
python-build-workflow / build-linux-py (11, _2_28-aarch64)	5h 12m 41s
cxx-build-workflow / build-test-cxx (macos-13)	38m 40s
cxx-build-workflow / build-test-cxx (macos-14)	19m 9s
python-build-workflow / build-macos-arm-py (11)	33m 22s
python-build-workflow / build-windows-python-packages (11)	45m 3s
python-build-workflow / publish-python-packages-to-pypi	21s
python-build-workflow / test-linux-notebooks	0s
	9h 31m 22s

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