Update README.md to refine the description of XML-formatted prompts and remove the no-context example

Author: robertpiosik

README.md

@@ -43,7 +43,7 @@ Code Web Chat (CWC) is a free and open-source, privacy-first **AI coding toolkit
 
 In the world of AI coding, agents like Claude Code or Codex rely on "Function Calling" (where the AI asks "the harness" to read a file, waits for the tool to respond, then reads another). CWC flips this! By providing files upfront the model is guided in the right direction from the start, so you can save time and tokens!
 
-**XML-formatted messages:**
+**CWC constructs zero-overhead, XML-formatted prompts, such like:**
 
 <details>
 <summary>Edit context</summary>
@@ -93,15 +93,6 @@ Find all files building modules of the following task's scope:
 
 </details>
 
-<details>
-<summary>No context</summary>
-
-```
-[user-typed prompt]
-```
-
-</details>
-
 ## Prompt caching
 
 When working with CWC, it's natural to start new chats (send fresh messages) instead of continuing a long conversation. With context files ordered based on update and selection recency, **[prompt caching](https://developers.openai.com/api/docs/guides/prompt-caching) is effectively utilized across tasks**.