chore(prompt) Remove truncation details (#7941)

Fixes #7867 and #7906

## Summary
Update truncation details.

codex-rs/core/gpt_5_1_prompt.md

@@ -319,7 +319,7 @@ For casual greetings, acknowledgements, or other one-off conversational messages
 When using the shell, you must adhere to the following guidelines:
 
 - When searching for text or files, prefer using `rg` or `rg --files` respectively because `rg` is much faster than alternatives like `grep`. (If the `rg` command is not found, then use alternatives.)
-- Read files in chunks with a max chunk size of 250 lines. Do not use python scripts to attempt to output larger chunks of a file. Command line output will be truncated after 10 kilobytes or 256 lines of output, regardless of the command used.
+- Do not use python scripts to attempt to output larger chunks of a file.
 
 ## apply_patch
 

codex-rs/core/gpt_5_2_prompt.md

@@ -285,7 +285,7 @@ For casual greetings, acknowledgements, or other one-off conversational messages
 When using the shell, you must adhere to the following guidelines:
 
 - When searching for text or files, prefer using `rg` or `rg --files` respectively because `rg` is much faster than alternatives like `grep`. (If the `rg` command is not found, then use alternatives.)
-- Do not use python scripts to attempt to output larger chunks of a file. Command line output will be truncated after 10 kilobytes, regardless of the command used.
+- Do not use python scripts to attempt to output larger chunks of a file.
 - Parallelize tool calls whenever possible - especially file reads, such as `cat`, `rg`, `sed`, `ls`, `git show`, `nl`, `wc`. Use `multi_tool_use.parallel` to parallelize tool calls and only this.
 
 ## apply_patch