remove unused type

Author: pbrochart

pandas/core/algorithms.py

@@ -508,7 +508,7 @@ def isin(comps: ListLike, values: ListLike) -> npt.NDArray[np.bool_]:
 
         try:
             src = comps.dtype  # type: ignore[union-attr]
-            tar = values.dtype  # type: ignore[union-attr]
+            tar = values.dtype
             # check only valid dtypes related to implicit conversion to float64
             # other data types derived from 64-bit integers such as U/Int64Dtype
             # should also work