Revert "Completely new cross-platform API introduced" #428

Job	Run time
health / signal-rerun	6s
health / do-not-submit / run do-not-submit health check	36s
health / coverage / run coverage health check	53s
health / license / run license health check	38s
health / breaking / run breaking health check	38s
health / leaking / run leaking health check	46s
health / unused-dependencies / run unused-dependencies health check	38s
health / changelog / run changelog health check	33s
health / comment	8s
	4m 56s

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