📝 docs update: remove ChatGPTbrowser and other small fixes (#1686)

* 🧼 docs: remove references to ChatGPTbrowser and PandoraNext

* docs: clean up .env file

Update OpenAI models with the list of automatically fetched models, update Plugin models with the list of models supporting functions, comment out ToC in custom_config.md since it conflicts with mkdock right sidebar ToC

* 🖋️ docs: fix formatting in linux_install.md

* docs: update example model lists in dotenv.md

* docs: update breaking_changesv.md

docs/install/configuration/ai_setup.md

@@ -30,7 +30,6 @@ weight: -8
     - [Using Plugins with Azure](#using-plugins-with-azure)
   - [OpenRouter](#openrouter)
   - [Unofficial APIs](#unofficial-apis)
-    - [ChatGPTBrowser](#chatgptbrowser)
     - [BingAI](#bingai)
   - [Conclusion](#conclusion) -->
 
@@ -447,27 +446,6 @@ OpenRouter is integrated to the LibreChat by overriding the OpenAI endpoint.
 
 **Important:** Stability for Unofficial APIs are not guaranteed. Access methods to these APIs are hacky, prone to errors, and patching, and are marked lowest in priority in LibreChat's development.
 
-### ChatGPTBrowser
-
-**Backend Access to https://chat.openai.com/api**
-
-This is not to be confused with [OpenAI's Official API](#openai)!
-
-> Note that this is disabled by default and requires additional configuration to work. 
-> Also, using this may have your data exposed to 3rd parties if using a proxy, and OpenAI may flag your account.
-> See: [ChatGPT Reverse Proxy](../../features/pandoranext.md)
-
-To get your Access token for ChatGPT Browser Access, you need to:
-
-- Go to **[https://chat.openai.com](https://chat.openai.com)**
-- Create an account or log in with your existing one
-- Visit **[https://chat.openai.com/api/auth/session](https://chat.openai.com/api/auth/session)**
-- Copy the value of the "accessToken" field and save it in ./.env as CHATGPT_ACCESS_TOKEN
-
-Warning: There may be a chance of your account being banned if you deploy the app to multiple users with this method. Use at your own risk.
-
----
-
 ### BingAI
 I recommend using Microsoft Edge for this: