update no trainer scripts to remove check for main process while initiating trackers
# What does this PR do?

This PR updates no_trainer examples with tracking enabled to remove the check for `is_main_process` while initiating trackers by `accelerator.init_trackers()` as this method automatically initializes the trackers on the main process. This behavior was merged in Accelerate in this [PR](https://github.com/huggingface/accelerate/pull/642)

- [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
- [x] Did you read the [contributor guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
- [ ] Was this discussed/approved via a Github issue or the [forum](https://discuss.huggingface.co/)? Please add a link
      to it if that's the case.
- [ ] Did you make sure to update the documentation with your changes? Here are the
      [documentation guidelines](https://github.com/huggingface/transformers/tree/main/docs), and
      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?


## Who can review?
@muellerzr @sgugger 
_The documentation is not available anymore as the PR was closed or merged._