Remove jenkins_aptly_storages default value

Change-Id: I154f55473afdfae6aebaae1f5804d149cc9debcb
diff --git a/jenkins/client/job/aptly.yml b/jenkins/client/job/aptly.yml
index 82e5ac7..83b70cb 100644
--- a/jenkins/client/job/aptly.yml
+++ b/jenkins/client/job/aptly.yml
@@ -1,6 +1,4 @@
 parameters:
-  _param:
-    jenkins_aptly_storages: "local"
   jenkins:
     client:
       view: