Merge "Remove unused codes that was used in setChildChain" am: fd6a2d7c8c am: 79493c841d am: 788d160972 am: 88dc0886a1

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2130594

Change-Id: I93d2aba235d7f46c538fc3ccbd05a70246e4df40
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>