Remove unused helpers for functional test

DPadHelper moved to the utils dir
CommandHelper replaced with the one in system-helpers

Bug: 31636187
Bug: 31635441
Change-Id: I63a3e97fb5d6145baeb85cdf84e9033c18bfc794
3 files changed
tree: fe9335bd112adc940a754e2061184dad717ecc34
  1. libraries/
  2. scripts/
  3. tests/
  4. utils/