docs: remove deprecated subscribe rules section from routing docs

Subscribe rules (订阅规则) is a deprecated feature no longer shown to
new users. Removed the section added in f015 from both zh/ and en/
routing-rules.mdx.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ysyneu

en/on-call/integration/alert-integration/routing-rules.mdx

@@ -119,20 +119,6 @@ Before using name mapping mode, ensure channel names exactly match label values,
 </Tab>
 </Tabs>
 
-## Subscribe Rules
-
-In addition to routing rules, the system also supports **subscribe rules**. Subscribe rules run after routing rules and are used to additionally deliver alerts to interested channels without affecting the original routing logic.
-
-| Comparison | Routing Rules | Subscribe Rules |
-| :--- | :--- | :--- |
-| Configuration Location | Integration Details → Routing tab | Channel → Subscribe Settings |
-| Execution Order | Runs first | Runs after |
-| Purpose | Determine which channels alerts are delivered to | Additionally deliver matching alerts to the current channel |
-
-<Note>
-Channels matched by routing rules and subscribe rules are automatically deduplicated — the same alert will not generate duplicate incidents in the same channel.
-</Note>
-
 ## FAQ
 
 <AccordionGroup>

zh/on-call/integration/alert-integration/routing-rules.mdx

@@ -120,20 +120,6 @@ keywords: ["路由规则", "告警路由", "分发策略", "协作空间", "分
 </Tab>
 </Tabs>
 
-## 订阅规则
-
-除了路由规则外，系统还支持**订阅规则**。订阅规则在路由规则之后执行，用于将告警额外投递到感兴趣的协作空间，而不影响原有的路由逻辑。
-
-| 对比项 | 路由规则 | 订阅规则 |
-| :--- | :--- | :--- |
-| 配置位置 | 集成详情 → 路由页签 | 协作空间 → 订阅设置 |
-| 执行顺序 | 先执行 | 后执行 |
-| 作用 | 决定告警投递到哪些协作空间 | 将符合条件的告警额外投递到当前空间 |
-
-<Note>
-路由规则和订阅规则匹配到的协作空间会自动去重——同一条告警不会在同一个空间中重复生成故障。
-</Note>
-
 ## 常见问题
 
 <AccordionGroup>