Task: Delete unnecessary indicator configuration

- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.

## Describe the proposal

目前指标采集暴露端口已经将其复用到了qos端口中，原先开发的部分普罗米修斯配置项已经无用，需要将其删除保证代码的优雅

At present, the indicator collection exposure port has been reused into the qos port. Some of the Prometheus configuration items that were originally developed are useless, and need to be deleted to ensure the elegance of the code

The issue names no files or tests. Start by locating the Prometheus configuration items for indicator collection and tracing how the exposure port now uses QoS; verify their references and tests before removing anything. Done means the unused configuration is gone without breaking the QoS-based metrics exposure.

Written by the indexing model from the issue text.