style: fix linting and format

Author: juelg

extensions/rcs_robotics_library/src/rcs_robotics_library/__init__.pyi

@@ -2,6 +2,4 @@ from __future__ import annotations
 
 from rcs_robotics_library._core import rl
 
-from . import _core
-
 __all__: list = ["rl"]

extensions/rcs_so101/src/rcs_so101/creators.py

@@ -14,8 +14,6 @@
 from rcs_so101 import SO101IK
 from rcs_so101.hw import SO101, SO101Config, SO101Gripper
 
-import rcs
-
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.INFO)