Purge filterserv related code in client

[ISSUE #461]Purge filterserv related code in client

client/src/main/java/org/apache/rocketmq/client/consumer/MQPushConsumer.java

@@ -55,11 +55,15 @@ public interface MQPushConsumer extends MQConsumer {
     void subscribe(final String topic, final String subExpression) throws MQClientException;
 
     /**
+     * This method will be removed in the version 5.0.0,because filterServer was removed,and method <code>subscribe(final String topic, final MessageSelector messageSelector)</code>
+     * is recommended.
+     *
      * Subscribe some topic
      *
      * @param fullClassName full class name,must extend org.apache.rocketmq.common.filter. MessageFilter
      * @param filterClassSource class source code,used UTF-8 file encoding,must be responsible for your code safety
      */
+    @Deprecated
     void subscribe(final String topic, final String fullClassName,
         final String filterClassSource) throws MQClientException;
 

client/src/main/java/org/apache/rocketmq/client/impl/factory/MQClientInstance.java

@@ -720,7 +720,11 @@ public class MQClientInstance {
 
         return false;
     }
-
+    /**
+     * This method will be removed in the version 5.0.0,because filterServer was removed,and method <code>subscribe(final String topic, final MessageSelector messageSelector)</code>
+     * is recommended.
+     */
+    @Deprecated
     private void uploadFilterClassToAllFilterServer(final String consumerGroup, final String fullClassName,
         final String topic,
         final String filterClassSource) throws UnsupportedEncodingException {