replication_factor must be passed in at the command line

update-replication-factor.yml

diff --git a/update-replication-factor.yml b/update-replication-factor.yml
index cca27e3..60be3f2 100644
--- a/update-replication-factor.yml
+++ b/update-replication-factor.yml
@@ -50,7 +50,6 @@
   tags: ['update-replication-factor']
   serial: 1
   vars:
-    replication_factor: 6
     cassandra_keyspaces:
     - auth
     - cache