Remove build-flow plugin
The build-flow plugin is not supported anymore for newer Jenkins
versions. It was superseded by the pipeline plugin.
Change-Id: I75d6c96bc445bb0bb99a1d95ad43ab62af828769
diff --git a/jenkins-docker/master/plugins.txt b/jenkins-docker/master/plugins.txt
index 331155f..f0aaedc 100644
--- a/jenkins-docker/master/plugins.txt
+++ b/jenkins-docker/master/plugins.txt
@@ -21,7 +21,6 @@
blueocean-rest-impl:1.3.5
blueocean-web:1.3.5
branch-api:2.0.20
-build-flow-plugin:0.20
build-timeout:1.19
cloudbees-bitbucket-branch-source:2.5.0
cloudbees-folder:6.4
