removing legacy and sites as part of cleanup #824

Job	Run time
Builds (backend/users) / backend/users	2m 34s
Builds (frontend) / frontend	48s
Builds (backend/gateway) / backend/gateway	2m 19s
Builds (backend/applications) / backend/applications	2m 27s
Unit Tests (backend/applications) / backend/applications	3m 22s
Unit Tests (frontend) / frontend	3m 30s
Unit Tests (backend/users) / backend/users	3m 5s
Unit Tests (backend/gateway) / backend/gateway	3m 23s
Static Analysis	1m 6s
	22m 34s

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