Remove unused features from initial bot message in ChatStore

- Removed /code, /commit_message, /release_note, and /extension features from the initial bot message in ChatStore.

src/views/stores/ChatStore.ts

@@ -223,16 +223,8 @@ Don't forget to check out the "+" button on the left of the input to add more co
 
 To get started, here are the things that DevChat can do:
 
-[/code: write code based on your prompt](#code)
-
-[/commit_message: write a commit message based on your code](#commit_message)
-
-[/release_note: write the release code based on your code](#release_note)
-
 [/ask_code: ask questions about your own codebase](#ask_code)
 
-[/extension: create extensions for DevChat](#extension)
-
 <button value="settings">Settings</button>
                             `}));
                 }