removing dtype from _normalize_summation

cunumeric/array.py

@@ -3094,21 +3094,19 @@ def _normalize_summation(
         self,
         sum_array: Any,
         axis: Any,
-        dtype: np.dtype[Any],
         ddof: int = 0,
         keepdims: bool = False,
         where: Union[ndarray, None] = None,
     ) -> None:
+        dtype = sum_array.dtype
         if axis is None:
             if where is not None:
                 divisor = where._count_nonzero() - ddof
             else:
                 divisor = reduce(lambda x, y: x * y, self.shape, 1) - ddof
         else:
             if where is not None:
-                divisor = where.sum(
-                    axis=axis, dtype=sum_array.dtype, keepdims=keepdims
-                )
+                divisor = where.sum(axis=axis, dtype=dtype, keepdims=keepdims)
                 if ddof != 0 and not np.isscalar(divisor):
                     mask = divisor != 0
                     values = divisor - ddof
@@ -3121,9 +3119,9 @@ def _normalize_summation(
         # Divide by the number of things in the collapsed dimensions
         # Pick the right kinds of division based on the dtype
         if isinstance(divisor, ndarray):
-            divisor = divisor.astype(sum_array.dtype)
+            divisor = divisor.astype(dtype)
         else:
-            divisor = np.array(divisor, dtype=sum_array.dtype)  # type: ignore [assignment] # noqa
+            divisor = np.array(divisor, dtype=dtype)  # type: ignore [assignment] # noqa
 
         if dtype.kind == "f" or dtype.kind == "c":
             sum_array.__itruediv__(divisor)
@@ -3179,7 +3177,7 @@ def mean(
         )
 
         self._normalize_summation(
-            sum_array, axis, dtype, keepdims=keepdims, where=where_array
+            sum_array, axis, keepdims=keepdims, where=where_array
         )
 
         # Convert to the output we didn't already put it there
@@ -3303,7 +3301,6 @@ def var(
         self._normalize_summation(
             result,
             axis=axis,
-            dtype=result.dtype,
             ddof=ddof,
             keepdims=keepdims,
             where=where_array,