liblog: remove stderr logger

There are no users of the liblog stderr logger, but 66 users of
android::base::StderrLogger.  We'll prefer that format and work to
merge it into liblog.

Test: liblog-unit-tests
Change-Id: Ifad24b27ac0f51379b925f6644caa1f6f3d9ad81
9 files changed
tree: f9b7a20c4db323c2ad988390f5fe4e0d78426075
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/