refactor-864370: Remove callback from examiner.run
refactor-864370: Remove callback from examiner.run

Last vestiges of a pre-promise world. Not used. Removed.

Signed-off-by: Joe Walker <7a17872fbb32c7d760c9a16ee3076daead11efcf@mozilla.com>

mozilla/gcli,mozilla/gcli,mozilla/gcli,joewalker/gcli,joewalker/gcli