Remove Outdated Repo Cleanup BwC Check (#55504)

Master/8 won't connect to pre-7.4 ever so no need for this check.

server/src/main/java/org/elasticsearch/action/admin/cluster/repositories/cleanup/TransportCleanupRepositoryAction.java

@@ -21,7 +21,6 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.message.ParameterizedMessage;
-import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.ActionRunnable;
 import org.elasticsearch.action.StepListener;
@@ -73,8 +72,6 @@ public final class TransportCleanupRepositoryAction extends TransportMasterNodeA
 
     private static final Logger logger = LogManager.getLogger(TransportCleanupRepositoryAction.class);
 
-    private static final Version MIN_VERSION = Version.V_7_4_0;
-
     private final RepositoriesService repositoriesService;
 
     private final SnapshotsService snapshotsService;
@@ -147,13 +144,8 @@ protected CleanupRepositoryResponse read(StreamInput in) throws IOException {
 
     @Override
     protected void masterOperation(Task task, CleanupRepositoryRequest request, ClusterState state,
-        ActionListener<CleanupRepositoryResponse> listener) {
-        if (state.nodes().getMinNodeVersion().onOrAfter(MIN_VERSION)) {
-            cleanupRepo(request.name(), ActionListener.map(listener, CleanupRepositoryResponse::new));
-        } else {
-            throw new IllegalArgumentException("Repository cleanup is only supported from version [" + MIN_VERSION
-                + "] but the oldest node version in the cluster is [" + state.nodes().getMinNodeVersion() + ']');
-        }
+                                   ActionListener<CleanupRepositoryResponse> listener) {
+        cleanupRepo(request.name(), ActionListener.map(listener, CleanupRepositoryResponse::new));
     }
 
     @Override