[SETUP] Move register_cache from setup_helper.py to utils

Author: zhzhcookie

.github/workflows/nvidia3.6-build-and-test.yml

@@ -81,8 +81,6 @@ jobs:
         run: |
           set -x
           source ~/env-3.6.sh
-          export FLAGCX_RECOMPILE=ON
-          export USE_FLAGCX=ON
           MAX_JOBS=32 python3 -m pip install . --no-build-isolation -v
 
       - name: Clear cache if ClearCache label present

python/setup_tools/utils/__init__.py

@@ -21,7 +21,7 @@
 from pathlib import Path
 import importlib.util
 import os
-from . import tools, default, aipu
+from . import tools, default
 from .tools import flagtree_configs, OfflineBuildManager