Remove `AssertDependency` #208

Job	Run time
Library (evolution)	58s
Library (swift 5.7) (debug)	14m 45s
Library (swift 5.7) (release)	12m 59s
static-stdlib (swift:5.7-focal)	1m 0s
Library (swift-latest) (debug)	14m 26s
ubuntu-tests (ubuntu-20.04)	1m 9s
static-stdlib (swift:5.8-focal)	1m 1s
Library (swift-latest) (release)	14m 19s
	1h 0m 37s

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