The following directories are obsolete and should be removed:

tests/app-lifecycle
tests/golden-image-suite

The former was migrated to tests/system by RT-32949.

The latter was a partially complete attempt at an automated controls rendering test suite for Modena-based controls. It has an out-of-date copy of the Modena test app that hasn't been updated in about 18 months. It uses the deprecated builders, and would need work to keep it in sync with the shipping sample, which is not planned.