disable transformers pooler

[maxdebayser]

Description

The pooler is always run in in the transformers code even when the outputs aren't used. And in our case, we instantiate the pooler outside of the transformers code to use the vLLM code. In a small test that I'm using the total time goes from 1.8s to 1.2s,.

[github-actions]

👋 Hi! Thank you for contributing to vLLM support on Spyre.
Just a reminder: Make sure that your code passes all the linting checks, otherwise your PR won't be able to be merged. To do so, first install the linting requirements, then run format.sh and commit the changes. This can be done with uv directly:

uv sync --frozen --group lint --active --inexact

Or this can be done with pip:

uv pip compile --group lint > requirements-lint.txt
pip install -r requirements-lint.txt
bash format.sh

Now you are good to go 🚀