pcp: delist runtime dependencies

chan and HdrHistogram_c are runtime dependencies of pcp subpackages, but
should not be explicitly listed, so that they'll be dropped if that ever
changes.

js-d3-flame-graph is a documented use case and therefore remains:

https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/10/html/monitoring_and_managing_system_status_and_performance/getting-started-with-flamegraphs

Author: yselkowitz

configs/rhel-pt-pcp--pcp-grafana.yaml

@@ -6,10 +6,8 @@ data:
   maintainer: rhel-pt-pcp
   packages:
     - ansible-pcp
-    - chan
     - grafana
     - grafana-pcp
-    - HdrHistogram_c
     - js-d3-flame-graph
     - pcp
     - pcp-conf