Apple is stripping out GPL3 based components
More specifically, Apple does not and never has allowed GPLv3 code into the building. They're not stripping out GPLv3 code, they're staying with old versions of projects that switched to GPLv3 until a permissively licensed replacement is finished. This is not a strategy exclusive to Apple - a lot of companies were unhappy with GPLv2 and now find GPLv3 quite scary. We've had quite a few companies start to contribute to FreeBSD and related projects as a result of GPLv3.