Remove broken CuPy 13.x memory pool setup

lidar_pipeline/gpu.py

@@ -123,10 +123,8 @@ def _init_gpu():
         _cp = _real_cupy
         _cp_ndimage = _real_cupy_ndimage
 
-        props = _real_cupy.cuda.runtime.getDeviceProperties(0)
-        total_mem = props['totalGlobalMem']
-        pool_size = int(total_mem * 0.9)
-        _real_cupy.cuda.set_memory_pool(0, pool_size)
+        # Memory pool management removed — CuPy 13.x uses its own allocator.
+        # OOM protection handled at the application level (gpu_cleanup() calls).
 
     except (ImportError, Exception) as e:
         logger.warning(f"GPU {_best_gpu_id} ({_gpu_name}) non utilisable — mode CPU: {e}")