Remove DeviceHealthTests

This test has been deprecated and replaced by DeviceHealthChecks a
long time ago, but it was never cleaned up. On top of that, the
crash checks in this test has been broken since Q release, leaving
confusions for users: they are not actually getting the coverage
of crash checks since all the crash checks will be reporting passing
regardless of actual failures.

Bug: 193459993
Change-Id: If5f94827c53f207fa48af097a0103d99932780f0
Test: compile, presubmit
10 files changed
tree: 89779d3f721d442e25c9fb7397f9db8bddcea9bb
  1. build/
  2. docs/
  3. emu_test/
  4. libraries/
  5. scripts/
  6. tests/
  7. utils/
  8. PREUPLOAD.cfg