transformers

8d9923aa - 🚨 [v5][PEFT] Bump min version requirement of PEFT to 0.18.0 (#41889)

🚨 [v5][PEFT] Bump min version requirement of PEFT to 0.18.0 (#41889) PEFT is an optional dependency of transformers with a min version of 0.5.0. However, starting with transformers v5, older PEFT versions will not work anymore (see #41406). The minimum PEFT version will be 0.18.0. This PR updates the PEFT integration to require PEFT 0.18.0. This allows us to eliminate some obsolete checks and tests that were required for backwards compatibility.