fix mypy typ error (#45068)

Co-authored-by: Kashif Khan <[email protected]>

Author: kashifkhan

pandas/core/arrays/timedeltas.py

@@ -748,12 +748,8 @@ def __rfloordiv__(self, other):
             return result
 
         elif is_object_dtype(other.dtype):
-            # error: Incompatible types in assignment (expression has type
-            # "List[Any]", variable has type "ndarray")
-            result = [  # type: ignore[assignment]
-                other[n] // self[n] for n in range(len(self))
-            ]
-            result = np.array(result)
+            result_list = [other[n] // self[n] for n in range(len(self))]
+            result = np.array(result_list)
             return result
 
         else: