Remove TEST_MAPPING file unit_test:true is sufficient

unit_test:true all run in presubmit already which makes
the TEST_MAPPING definition unrequired.

Test: presubmit
Bug: 175408655
Change-Id: I34a0e2e4a41e69548982cd17b9b3566580a72f51
1 file changed
tree: de744b6e5274647461e41789ced2ef7e247bd6dd
  1. build/
  2. docs/
  3. emu_test/
  4. libraries/
  5. scripts/
  6. tests/
  7. utils/
  8. PREUPLOAD.cfg