[DOCS] Remove remaining beta flags for RCS (#108201)

docs/reference/cluster/remote-info.asciidoc

@@ -69,7 +69,6 @@ Refer to <<skip-unavailable-clusters>>.
     mode is configured.
 
 `cluster_credentials`::
-beta:[]
 This field presents and has value of `::es_redacted::` only when the
 <<remote-clusters-api-key,remote cluster is configured with the API key based model>>.
 Otherwise, the field is not present.

docs/reference/modules/network.asciidoc

@@ -67,7 +67,6 @@ Defaults to `9300-9400`.
 [[remote_cluster.port]]
 `remote_cluster.port`::
 (<<static-cluster-setting,Static>>, integer)
-beta:[]
 The port to bind for remote cluster client communication. Accepts a single value.
 +
 Defaults to `9443`.

docs/reference/rest-api/security.asciidoc

@@ -71,7 +71,7 @@ without requiring basic authentication:
 * <<security-api-update-api-key,Update REST API key>>
 * <<security-api-bulk-update-api-keys,Bulk update REST API keys>>
 
-beta:[] Use the following APIs to create and update cross-cluster API keys for
+Use the following APIs to create and update cross-cluster API keys for
 <<remote-clusters-api-key,API key based remote cluster access>>:
 
 * <<security-api-create-cross-cluster-api-key,Create Cross-Cluster API key>>