disabled AMP check (not supported anyway)

ultralytics/utils/checks.py

@@ -448,6 +448,7 @@ def check_amp(model):
     Returns:
         (bool): Returns True if the AMP functionality works correctly with YOLOv8 model, else False.
     """
+    return False
     device = next(model.parameters()).device  # get model device
     if device.type in ('cpu', 'mps'):
         return False  # AMP only used on CUDA devices