remove useless code

Author: rayzhang0603

motan-core/src/main/java/com/weibo/api/motan/cluster/group/DefaultClusterSelector.java

@@ -50,31 +50,6 @@ public Cluster<T> select(Request request) {
         return clusterGroup.getMasterCluster();
     }
 
-    private boolean isMatch(Request request, Cluster<T> cluster, String defaultValue) {
-        if (cluster != null && !CollectionUtil.isEmpty(cluster.getReferers())) {
-            // Check the route group of the request
-            String routeGroup = request.getAttachment(MotanConstants.ROUTE_GROUP_KEY);
-            if (routeGroup != null) {
-                routeGroup = routeGroup.trim();
-                // If the route group is default value, such as "sandbox", return true
-                if (defaultValue != null && defaultValue.equals(routeGroup)) {
-                    return true;
-                }
-
-                // Check the comma-separated group list
-                String[] routeGroupList = routeGroup.split(",");
-                String targetGroup = cluster.getUrl().getGroup();
-                for (String group : routeGroupList) {
-                    group = group.trim();
-                    if (group.equals(targetGroup)) { // if the route group is the same as the target group, return true
-                        return true;
-                    }
-                }
-            }
-        }
-        return false;
-    }
-
     @Override
     public void init(ClusterGroup<T> clusterGroup) {
         if (clusterGroup == null) {

motan-core/src/main/java/com/weibo/api/motan/config/RefererConfig.java

@@ -47,8 +47,8 @@
  */
 
 public class RefererConfig<T> extends AbstractRefererConfig {
-    private static final ConcurrentHashSet<String> NONE_EXTRA_GROUP_PROTOCOL_SET = new ConcurrentHashSet<>(); // The set of protocols that do not support sandbox grouping.
-    private static final ConcurrentHashSet<String> NONE_EXTRA_GROUP_REGISTRY_SET = new ConcurrentHashSet<>(); // The set of protocols that do not support sandbox grouping.
+    private static final ConcurrentHashSet<String> NONE_EXTRA_GROUP_PROTOCOL_SET = new ConcurrentHashSet<>(); // The set of protocols that do not support sandbox/grey grouping.
+    private static final ConcurrentHashSet<String> NONE_EXTRA_GROUP_REGISTRY_SET = new ConcurrentHashSet<>(); // The set of registries that do not support sandbox/grey grouping.
 
     static {
         NONE_EXTRA_GROUP_PROTOCOL_SET.add(MotanConstants.PROTOCOL_INJVM);