Remove dead code. am: 2422319cb7 am: 9d288a6904

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1703126

Change-Id: I3913a868982465f304ea5f48da538096dd900641
tree: 3b37b0f0a603d2a5d23c31164df8aed5fe5459d0
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING