This PR aims to clean up the useless code for LLM setup. It helps to make the code more clear. 1. remove useless `self.xxx` property 2. change `set_random_seed` to `seed_everything` 3. remove `set_custom_all_reduce`, it's only used for cuda This is just a code clean. no change for any code logic. Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>