Remove torchtune (#871)

Author: Jack-Khuu

README.md

@@ -19,7 +19,6 @@ torchchat is a small codebase showcasing the ability to run large language model
   - [Deploy and run on iOS](#deploy-and-run-on-ios)
   - [Deploy and run on Android](#deploy-and-run-on-android)
 - [Evaluate a mode](#eval)
-- [Fine-tuned models from torchtune](docs/torchtune.md)
 - [Supported Models](#models)
 - [Troubleshooting](#troubleshooting)
 

build/convert_torchtune_checkpoint.py

@@ -215,8 +215,8 @@ adapted to support other models, either by extending the model
 description in `model.py` or by initializing a completely different
 model.  *We invite and welcome community contributions of open-source
 model enablement to torchchat, as well as to our related open source
-projects PyTorch, ExecuTorch (for mobile/edge models), torchtune (for
-model finetuning), torchao (for architecture optimization) and other
+projects PyTorch, ExecuTorch (for mobile/edge models), torchao 
+(for architecture optimization) and other
 PyTorch projects.* (Please refer to individual projects for specific
 submission guidelines.)