Remove /workflow command as not existing anymore #2 (#24097)

Follow-up of https://github.com/zed-industries/zed/pull/24095

Release Notes:

- N/A

docs/src/assistant/commands.md

@@ -19,8 +19,6 @@ Slash commands enhance the assistant's capabilities. Begin by typing a `/` at th
 
 - `/search`: Performs semantic search for content in your project based on natural language
   - Not generally available yet, but some users may have access to it.
-- `/workflow`: Opts into the edit workflow for a specific context
-  - Not generally available yet.
 
 > **Note:** Remember, commands are only evaluated when the context is created or when the command is inserted, so a command like `/now` won't continuously update, or `/file` commands won't keep their contents up to date.
 

docs/src/assistant/configuration.md

@@ -6,16 +6,14 @@ The following providers are supported:
 
 - [Zed AI (Configured by default when signed in)](#zed-ai)
 - [Anthropic](#anthropic)
-- [GitHub Copilot Chat](#github-copilot-chat) [^1]
-- [Google AI](#google-ai) [^1]
+- [GitHub Copilot Chat](#github-copilot-chat)
+- [Google AI](#google-ai)
 - [Ollama](#ollama)
 - [OpenAI](#openai)
 - [LM Studio](#lmstudio)
 
 To configure different providers, run `assistant: show configuration` in the command palette, or click on the hamburger menu at the top-right of the assistant panel and select "Configure".
 
-[^1]: This provider does not support the [`/workflow`](./commands#workflow-not-generally-available) command.
-
 To further customize providers, you can use `settings.json` to do that as follows:
 
 - [Configuring endpoints](#custom-endpoint)