Fix galera upgrade template

Remove backup galera section, because it`s not
in upgrade scope.

Change-Id: I87ff60e1a07a92ead17fa4a4e47ac73fd65fbec6
Related-Prod: PROD-29630
diff --git a/jenkins/client/job/deploy/update/upgrade_galera.yml b/jenkins/client/job/deploy/update/upgrade_galera.yml
index 83593ec..8864529 100644
--- a/jenkins/client/job/deploy/update/upgrade_galera.yml
+++ b/jenkins/client/job/deploy/update/upgrade_galera.yml
@@ -27,10 +27,6 @@
             SALT_MASTER_CREDENTIALS:
               type: string
               default: "salt"
-            BACKUP_GALERA:
-              type: boolean
-              default: 'true'
-              description: "Backup galera cluster"
             SHUTDOWN_CLUSTER:
               type: boolean
               default: 'false'