Remove cookbook plugin as already built with Gerrit

Change-Id: Id52e6fd1ed05a84271f5dd3bd12eb281eafe3713
diff --git a/jenkins/gerrit-buck-plugin-cookbook-plugin.yaml b/jenkins/gerrit-buck-plugin-cookbook-plugin.yaml
deleted file mode 100644
index 545a3d0..0000000
--- a/jenkins/gerrit-buck-plugin-cookbook-plugin.yaml
+++ /dev/null
@@ -1,10 +0,0 @@
-- project:
-    name: cookbook-plugin
-    branch:
-      - master
-      - stable-2.12
-      - stable-2.11
-      - stable-2.10
-    jobs:
-      - 'plugin-{name}-{branch}'
-