Remove HLRC's SearchableSnapshotsClient (#85472)

This commit removes this sub-client as part of the work to remove the HLRC entirely.

Relates to #83423

client/rest-high-level/src/main/java/org/elasticsearch/client/RestHighLevelClient.java

@@ -279,7 +279,6 @@ public class RestHighLevelClient implements Closeable {
     private final SecurityClient securityClient = new SecurityClient(this);
     private final TransformClient transformClient = new TransformClient(this);
     private final EqlClient eqlClient = new EqlClient(this);
-    private final SearchableSnapshotsClient searchableSnapshotsClient = new SearchableSnapshotsClient(this);
 
     /**
      * Creates a {@link RestHighLevelClient} given the low level {@link RestClientBuilder} that allows to build the
@@ -378,16 +377,6 @@ public final SnapshotClient snapshot() {
         return snapshotClient;
     }
 
-    /**
-     * A wrapper for the {@link RestHighLevelClient} that provides methods for accessing the Searchable Snapshots APIs.
-     * <p>
-     * See the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/searchable-snapshots-apis.html">Searchable Snapshots
-     * APIs on elastic.co</a> for more information.
-     */
-    public SearchableSnapshotsClient searchableSnapshots() {
-        return searchableSnapshotsClient;
-    }
-
     /**
      * Provides methods for accessing the Elastic Licensed Security APIs that
      * are shipped with the Elastic Stack distribution of Elasticsearch. All of