Update README.md

skywalking-collector/skywalking-sdk-plugin/README.md

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 |web-plugin|追踪指定的url访问| [查看](web-plugin) |[ ![Download](https://api.bintray.com/packages/wu-sheng/skywalking/com.ai.cloud.skywalking-web-plugin/images/download.svg) ](https://bintray.com/wu-sheng/skywalking/com.ai.cloud.skywalking-web-plugin/_latestVersion) |
 |spring-plugin| 追踪spring托管的类实例 | [查看](spring-plugin) |[ ![Download](https://api.bintray.com/packages/wu-sheng/skywalking/com.ai.cloud.skywalking-spring-plugin/images/download.svg) ](https://bintray.com/wu-sheng/skywalking/com.ai.cloud.skywalking-spring-plugin/_latestVersion) |
-|dubbo-plugin| 追踪dubbo和dubbox的调用 | [查看](dubbo-plugin)|[ ![Download](https://api.bintray.com/packages/wu-sheng/skywalking/com.ai.cloud.skywalking-dubbo-plugin/images/download.svg) ](https://bintray.com/wu-sheng/skywalking/com.ai.cloud.skywalking-dubbo-plugin/_latestVersion) |
-|jdbc-plugin| 追踪通过JDBC规范访问数据库 | [查看](jdbc-plugin) |[ ![Download](https://api.bintray.com/packages/wu-sheng/skywalking/com.ai.cloud.skywalking-jdbc-plugin/images/download.svg) ](https://bintray.com/wu-sheng/skywalking/com.ai.cloud.skywalking-jdbc-plugin/_latestVersion) |
-|httpClient-4.x-plugin| 追踪通过httpClient发起的http访问 | [查看](httpClient-4.x-plugin) |[ ![Download](https://api.bintray.com/packages/wu-sheng/skywalking/com.ai.cloud.skywalking-httpClient-4.x-plugin/images/download.svg) ](https://bintray.com/wu-sheng/skywalking/com.ai.cloud.skywalking-httpClient-4.x-plugin/_latestVersion) |
-|jedis-2.x-plugin| 追踪jedis 2.8发起的redis访问 | [查看](jedis-2.x-plugin) |[ ![Download](https://api.bintray.com/packages/wu-sheng/skywalking/com.ai.cloud.skywalking-web-plugin/images/download.svg) ](https://bintray.com/wu-sheng/skywalking/com.ai.cloud.skywalking-web-plugin/_latestVersion) |
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+- 绝大多数插件，已经集成到skywalking-agent中，无需单独引入即可生效。