liblog: remove a few unused items

Test: build
Change-Id: I8a31ad3a9fcd6f74f3a0221d38b64e8e2ea7ea2d
3 files changed
tree: 69db60dc33fe4bb5d808f3ff951934afc45fed65
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/