HARK build on MacOS, Ubuntu and Windows

Remove `.readthedocs.yml` #2220

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Job	Run time
build (ubuntu-latest, 3.8)	9m 51s
build (ubuntu-latest, 3.9)	8m 48s
build (ubuntu-latest, 3.10)	8m 28s
build (macos-latest, 3.8)	11m 20s
build (macos-latest, 3.9)	10m 30s
build (macos-latest, 3.10)	13m 15s
build (windows-latest, 3.8)	15m 3s
build (windows-latest, 3.9)	13m 38s
build (windows-latest, 3.10)	18m 9s
	1h 49m 2s