(PTFE-248) Remove stab branch simplify #901

Job	Run time
unit (tests-api-mock)	47s
unit (utests)	48s
lint	34s
integration (tests-noqueue, QuickTest)	1m 44s
integration (tests-noqueue, RepositoryTests)	33s
integration (tests-noqueue, TestBertE)	5m 1s
integration (tests-noqueue, BuildFailedTest)	32s
integration (tests, QuickTest)	1m 42s
integration (tests-noqueue, TaskQueueTests)	2m 49s
integration (tests, RepositoryTests)	46s
integration (tests, TestBertE)	6m 3s
integration (tests-noqueue, TestQueueing)	39s
integration (tests, BuildFailedTest)	33s
unit (tests-server)	58s
integration (tests, TestQueueing)	4m 18s
integration (tests, TaskQueueTests)	2m 53s
	30m 40s

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