Merge "Tethering: remove dead code" am: abc0246c4f am: 26ddce1db9 am: 8aee835b45 am: bd32e37e06

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2138294

Change-Id: I100616ab75a1d0bda3197df28ee816cda32bd1e8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>