Remove master maven verification job

Change-Id: I79c336651042bfbcf9213779398f1f1fcc97e535
diff --git a/jjb/onos/onos-verify.yaml b/jjb/onos/onos-verify.yaml
index 13e52e0..eaf3222 100644
--- a/jjb/onos/onos-verify.yaml
+++ b/jjb/onos/onos-verify.yaml
@@ -735,7 +735,6 @@
     build-node: 'ubuntu16.04-basebuild-8c-15g'
 
     stream:
-      - 'master'
       - 'onos-1.12'
       - 'onos-1.13'