[DOCS] Remove outdated CCR note (elastic#15506)

With retention leases, users do not need to set
`index.soft_deletes.retention.operations` to replicate a Beats/APM index
using cross-cluster replication.

This removes a related note in the APM and Beats documentation.

libbeat/docs/template-config.asciidoc

@@ -69,11 +69,6 @@ setup.template.settings:
   index.number_of_replicas: 1
 ----------------------------------------------------------------------
 
-NOTE: If you want to use {ref}/xpack-ccr.html[{ccr}] to replicate {beatname_uc}
-indices to another cluster, you will need to add additional template settings to
-{ref}/ccr-requirements.html#ccr-overview-beats[enable soft deletes] on the
-underlying indices.
-
 *`setup.template.settings._source`*:: A dictionary of settings for the `_source` field. For the available settings,
 please see the Elasticsearch {ref}/mapping-source-field.html[reference].
 +