Feature flag should be disabled by default

From the docs: https://docs.gitlab.com/ee/development/documentation/feature_flags.html#criteria

ee/app/models/gitlab_subscription.rb

@@ -94,7 +94,7 @@ class GitlabSubscription < ApplicationRecord
   # We need to show seats in use for free or trial subscriptions
   # in order to make it easy for customers to get this information.
   def seats_in_use
-    return super unless Feature.enabled?(:seats_in_use_for_free_or_trial, type: :ops, default_enabled: true)
+    return super unless Feature.enabled?(:seats_in_use_for_free_or_trial, type: :ops)
     return super if has_a_paid_hosted_plan? || !hosted?
 
     seats_in_use_now