fix error: incompatible types in assignment

Signed-off-by: ytl0623 <david89062388@gmail.com>

Author: ytl0623

monai/metrics/utils.py

@@ -15,7 +15,7 @@
 from collections.abc import Iterable, Sequence
 from functools import cache, partial
 from types import ModuleType
-from typing import Any, overload
+from typing import Any, cast, overload
 
 import numpy as np
 import torch
@@ -79,14 +79,14 @@ def ignore_background(
 
     y_pred_out = y_pred
     if y_pred.shape[1] > 1:
-        y_pred_out = y_pred[:, 1:]
+        y_pred_out = cast(NdarrayTensor, y_pred[:, 1:])
 
     if y is None:
         return y_pred_out
 
     y_out = y
     if y.shape[1] > 1:
-        y_out = y[:, 1:]
+        y_out = cast(NdarrayTensor, y[:, 1:])
 
     return y_pred_out, y_out