Deduplicate ipex initialization code

sdxl_train_network.py

@@ -1,15 +1,10 @@
 import argparse
 import torch
 
-try:
-    import intel_extension_for_pytorch as ipex
+from library.ipex_interop import init_ipex
 
-    if torch.xpu.is_available():
-        from library.ipex import ipex_init
+init_ipex()
 
-        ipex_init()
-except Exception:
-    pass
 from library import sdxl_model_util, sdxl_train_util, train_util
 import train_network