CI: Remove bitsandbytes CI (#2858)

This has historically been added to PEFT since there was no equivalent
CI on bnb. Now this is no longer the case and these tests can be
removed.

Author: BenjaminBossan

.github/workflows/nightly-bnb.yml

@@ -52,9 +52,6 @@ tests_core_multi_gpu_bnb:
 tests_core_single_gpu_bnb:
 	python -m pytest -m "single_gpu_tests and bitsandbytes" tests/test_common_gpu.py $(if $(IS_GITHUB_CI),--report-log "core_single_gpu.log",)
 
-tests_gpu_bnb_regression:
-	python -m pytest tests/bnb/test_bnb_regression.py $(if $(IS_GITHUB_CI),--report-log "bnb_regression_gpu.log",)
-
 # For testing transformers tests for bnb runners
 transformers_tests:
 	RUN_SLOW=1 python -m pytest transformers-clone/tests/quantization/bnb $(if $(IS_GITHUB_CI),--report-log "transformers_tests.log",)

Makefile

@@ -4,5 +4,3 @@ Here we store all PEFT Docker images used in our testing infrastructure. We use
 
 - `peft-cpu`: PEFT compiled on CPU with all other HF libraries installed on main branch
 - `peft-gpu`: PEFT complied for NVIDIA GPUs with all other HF libraries installed on main branch
-- `peft-gpu-bnb-source`: PEFT complied for NVIDIA GPUs with `bitsandbytes` and all other HF libraries installed from main branch
-- `peft-gpu-bnb-latest`: PEFT complied for NVIDIA GPUs with `bitsandbytes` complied from main and all other HF libraries installed from latest PyPi