Jenkinsfile: remove unused GIT_SHA1 env-var
@@ -151,7 +151,6 @@ pipeline {
--name docker-pr$BUILD_NUMBER \
-e DOCKER_GITCOMMIT=${GIT_COMMIT} \
-e DOCKER_GRAPHDRIVER \
- -e GIT_SHA1=${GIT_COMMIT} \
docker:${GIT_COMMIT} \
hack/ci/janky
'''
