docs: drop spring-boot-semantic-kernel-chat refs (sample removed in 8fc5968da9)

The dedicated SK sample was removed from the main repo when 835ccfa45b made SK auto-config work as a transparent dep swap on spring-boot-ai-chat. SK is still reachable via `--runtime semantic-kernel` and the adapter capability matrix in tutorial 11 — only the now-orphan sample references in 00-cli, 11-ai-adapters, and whats-new are dropped.

Author: jfarcand

docs/src/content/docs/tutorial/00-cli.md

@@ -125,7 +125,6 @@ plain `mvn compile`.
 | `rag` | `spring-boot-rag-chat` | RAG chat with Spring AI vector store + embeddings |
 | `agent` | `spring-boot-dentist-agent` | Single agent with `@Agent` / `@Command` + skill file |
 | `koog` | `spring-boot-koog-chat` | JetBrains Koog runtime (Kotlin) |
-| `semantic-kernel` | `spring-boot-semantic-kernel-chat` | Microsoft Semantic Kernel runtime |
 | `multi-agent` | `spring-boot-multi-agent-startup-team` | 5-agent `@Coordinator` fleet with A2A specialists |
 | `classroom` | `spring-boot-ai-classroom` | Multi-room shared AI (Spring Boot + Expo React Native client) |
 

docs/src/content/docs/tutorial/11-ai-adapters.md

@@ -450,7 +450,6 @@ Each runtime has a corresponding sample application in the repo:
 | `spring-boot-ai-tools` | Built-in, `@AiTool` tool calling | [github](https://github.com/Atmosphere/atmosphere/tree/main/samples/spring-boot-ai-tools) |
 | `spring-boot-rag-chat` | Spring AI + vector store | [github](https://github.com/Atmosphere/atmosphere/tree/main/samples/spring-boot-rag-chat) |
 | `spring-boot-koog-chat` | Koog | [github](https://github.com/Atmosphere/atmosphere/tree/main/samples/spring-boot-koog-chat) |
-| `spring-boot-semantic-kernel-chat` | Microsoft Semantic Kernel | [github](https://github.com/Atmosphere/atmosphere/tree/main/samples/spring-boot-semantic-kernel-chat) |
 | `spring-boot-dentist-agent` | Built-in + `@Agent`/`@Command` workflow | [github](https://github.com/Atmosphere/atmosphere/tree/main/samples/spring-boot-dentist-agent) |
 | `spring-boot-multi-agent-startup-team` | Coordinator + multi-agent | [github](https://github.com/Atmosphere/atmosphere/tree/main/samples/spring-boot-multi-agent-startup-team) |
 

docs/src/content/docs/whats-new.md

@@ -370,7 +370,6 @@ Highlights:
 | `spring-boot-durable-sessions` | Session persistence across restarts |
 | `spring-boot-channels-chat` | Multi-channel (Slack/Telegram/Discord) chat |
 | `spring-boot-koog-chat` | Koog runtime streaming chat |
-| `spring-boot-semantic-kernel-chat` | Microsoft Semantic Kernel runtime streaming chat |
 | `spring-boot-otel-chat` | OpenTelemetry tracing with Jaeger |
 | `quarkus-chat` | Quarkus extension chat |
 | `grpc-chat` | Standalone gRPC transport |