[GitHub] [dubbo] GungnirLaevatain opened pull request #5577: remove duplicate code in UrlUtils#parseURL

["GungnirLaevatain (GitHub)" <gi...@apache.org>]

## What is the purpose of the change

``defaultProtocol`` won't be empty, because of [this](https://github.com/GungnirLaevatain/dubbo/blob/3b5dc6e53b04d313611ed907c0ba270f6ff06444/dubbo-common/src/main/java/org/apache/dubbo/common/utils/UrlUtils.java#L89)

## Brief changelog

``org.apache.dubbo.common.utils.UrlUtils``

## Verifying this change


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[ Full content available at: https://github.com/apache/dubbo/pull/5577 ]
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