Simplify Chemical System #1071

Job	Run time
Build MDANSE and run tests on ubuntu-latest	14m 7s
Build MDANSE and run tests on ubuntu-latest	14m 7s
Build MDANSE and run tests on ubuntu-latest	4h 0m 50s
Build MDANSE and run tests on ubuntu-latest	11m 30s
Build MDANSE and run tests on ubuntu-latest	11m 0s
Build MDANSE and run tests on ubuntu-latest	11m 0s
Build MDANSE and run tests on ubuntu-latest	12m 5s
Build MDANSE and run tests on ubuntu-latest	12m 5s
Build MDANSE and run tests on windows-latest	17m 57s
Build MDANSE and run tests on windows-latest	17m 57s
Build MDANSE and run tests on windows-latest	18m 17s
Build MDANSE and run tests on windows-latest	18m 17s
Build MDANSE and run tests on windows-latest	17m 36s
Build MDANSE and run tests on windows-latest	17m 36s
Build MDANSE and run tests on windows-latest	17m 26s
Build MDANSE and run tests on windows-latest	17m 26s
Build MDANSE and run tests on macOS-latest	10m 52s
Build MDANSE and run tests on macOS-latest	10m 52s
Build MDANSE and run tests on macOS-latest	8m 13s
Build MDANSE and run tests on macOS-latest	8m 13s
Build MDANSE and run tests on macOS-latest	8m 55s
Build MDANSE and run tests on macOS-latest	8m 55s
Build MDANSE and run tests on macOS-latest	8m 37s
Build MDANSE and run tests on macOS-latest	8m 37s
	9h 2m 30s

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