remove database backend #489 #1064

Job	Run time
Code Formatting	25s
Linting	31s
icatdb Generator Script Consistency Test	18m 28s
Dependency Safety	28s
Pip Install 3.6 Test	23s
Python 3.6 Build & Tests	13m 39s
Pip Install 3.7 Test	27s
Python 3.7 Build & Tests	14m 2s
Pip Install 3.8 Test	22s
Python 3.8 Build & Tests	13m 6s
Pip Install 3.9 Test	21s
Python 3.9 Build & Tests	13m 32s
Pip Install 3.10 Test	25s
Python 3.10 Build & Tests	15m 21s
Docker	0s
	1h 31m 30s

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