Update rules/apps.libsonnet

Co-authored-by: Stephen Lang <[email protected]>

Author: sleepyfoodie

rules/apps.libsonnet

@@ -10,9 +10,6 @@
         name: 'k8s.rules.container_cpu_usage_seconds_total',
         rules: [
           {
-            // Reduces cardinality of this timeseries by #cores, which makes it
-            // more useable in dashboards.  Also, allows us to do things like
-            // quantile_over_time(...) which would otherwise not be possible.
             record: 'node_namespace_pod_container:container_cpu_usage_seconds_total:sum_rate5m',
             expr: |||
               sum by (%(clusterLabel)s, namespace, pod, container) (