remove discovery module useless code (#595)

CHANGELOG.md

@@ -1,3 +1,4 @@
 # Change Log
 ---
 
+- [Optimize: remove discovery module useless code](https://github.com/Tencent/spring-cloud-tencent/pull/595)

spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/client/PolarisClient.java

@@ -1,50 +0,0 @@
-/*
- * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
- *
- * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * Unless required by applicable law or agreed to in writing, software distributed
- * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
- * CONDITIONS OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- */
-
-package com.tencent.cloud.polaris.client;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Inherited;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-/**
- * Annotation for Polaris Client for service configuration.
- *
- * @author Haotian Zhang, Andrew Shan, Jie Cheng
- */
-@Target(ElementType.TYPE)
-@Retention(RetentionPolicy.RUNTIME)
-@Documented
-@Inherited
-public @interface PolarisClient {
-
-	/**
-	 * Service name of instance.
-	 * @return service
-	 */
-	String service() default "";
-
-	/**
-	 * Namespace name of instance.
-	 * @return namespace
-	 */
-	String namespace() default "";
-
-}

spring-cloud-starter-tencent-polaris-discovery/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -36,12 +36,6 @@
       "defaultValue": "",
       "description": "heal check url."
     },
-    {
-      "name": "spring.cloud.polaris.discovery.instance-enabled",
-      "type": "java.lang.Boolean",
-      "defaultValue": true,
-      "description": "If instance is enabled to accept request. The default value is true."
-    },
     {
       "name": "spring.cloud.polaris.discovery.token",
       "type": "java.lang.String",