fix(package-styling-manual): remove a weird requirement

Author: chenx97

content/developer/packaging/package-styling-manual.md

@@ -95,7 +95,6 @@ The `SRCS=`, or `$SRCS` variable is used to indicate a list of source file(s) us
 | Criteria | Required/Recommended/Disallowed | Appropriate Actions |
 |-------------|----------------------------------------|---------------------------------|
 | Version substitutions | Required | Source links must replace all versions with substitutions from the `$VER` variable (see above). `SRCS=` must not be defined with hard-coded version(s). |
-| Versioned tarballs | Required | Source archives (tarballs) must be versioned in order to ensure consistency. |
 | Tarball origins | Required | Use the upstream-supplied mirroring/automatic redirection URLs whenever possible and avoid using any one of the mirrors. |
 | SourceForge releases | Required | Follow [official guidelines](https://sourceforge.net/p/forge/documentation/Downloading%20files%20via%20the%20command%20line/) and include the `/download` suffix in the URL, i.e. `tbl::https://sourceforge.net/projects/wqy/files/wqy-microhei/${UPSTREAM_VER}/wqy-microhei-${UPSTREAM_VER}.tar.gz/download"` |
 | URI schemes | Recommended | Use Hypertext Transfer Protocol Secure (HTTPS, https://) where possible. Avoid non-secure connections (http://) and plain FTP (File Transfer Protocol, ftp://). |

content/developer/packaging/package-styling-manual.zh.md

@@ -96,7 +96,6 @@ ACBS 在构建非 `stable` 分支软件包时也会在 `REL=` 追加 `~pre${ISO_
 | 项目 | 级别 | 应当采取的措施 |
 |-------------|----------------------------------------|---------------------------------|
 | 版本替换 | 要求 | 源码包地址中的所有软件包版本号必须替换为 `$VER` 变量。`$SRCS` 条目不应含有硬编码的版本号 |
-| 源码包版本号 | 要求 | 为了保证可持续性，源码包文件必须要有版本号 |
 | 源码包来源 | 要求 | 在可能的情况下尽可能使用官方推荐的源站或自动重定向设施，避免使用特定镜像站 |
 | SourceForge 源码包 | 要求 | 遵从[官方指引](https://sourceforge.net/p/forge/documentation/Downloading%20files%20via%20the%20command%20line/)，在源码 URL 末尾保留 `/download`，如：`tbl::https://sourceforge.net/projects/wqy/files/wqy-microhei/${UPSTREAM_VER}/wqy-microhei-${UPSTREAM_VER}.tar.gz/download"` |
 | 统一资源标识符 | 建议 | 尽可能使用 HTTPS（`https://`），避免使用 HTTP（`http://`）和 FTP（`ftp://`） |