Backed out changeset a99c84e10b62 (bug 1565725) for repack nightlies bustages. a=backout

taskcluster/ci/geckodriver-repack/kind.yml

@@ -28,7 +28,6 @@ job-defaults:
         chain-of-trust: true
     run:
         using: run-task
-        checkout: false
 
 jobs:
     linux-nightly/opt: