Makefile: Remove slave container from the build
Ubuntu 15.04, that the old slave cotainer is based on, is discontinued.
Remove that image from the build process, but preserve the slave
directory for now and consider to remove it later.
Change-Id: Iac6bb5e1eec2c0b55a11659052e86e7d240ee147
diff --git a/jenkins-docker/Makefile b/jenkins-docker/Makefile
index 7209271..51611cb 100644
--- a/jenkins-docker/Makefile
+++ b/jenkins-docker/Makefile
@@ -1,4 +1,4 @@
-DIRS=master slave slave-debian slave-buck slave-mvn slave-bazel slave-sbt
+DIRS=master slave-debian slave-buck slave-mvn slave-bazel slave-sbt
default: start
