diff --git a/aioreactive/transform.py b/aioreactive/transform.py
index 8a5eeab..66cf1ac 100644
--- a/aioreactive/transform.py
+++ b/aioreactive/transform.py
@@ -511,27 +511,3 @@ def scan_async(
     """
     return _scan(accumulator, initial)
 
-
-def reduce(
-    accumulator: Callable[[_TResult, _TSource], _TResult],
-    initial: _TResult,
-) -> Callable[[AsyncObservable[_TSource]], AsyncObservable[_TResult]]:
-    async def _reduce(current: _TResult, value: _TSource) -> _TResult:
-        return accumulator(current, value)
-
-    def _operator(Observable: AsyncObservable[_TSource]) -> AsyncObservable[_TResult]:
-        return pipe(Observable, reduce_async(_reduce, initial))
-
-    return _operator
-
-
-def reduce_async(
-    accumulator: Callable[[_TResult, _TSource], Awaitable[_TResult]],
-    initial: _TResult,
-) -> Callable[[AsyncObservable[_TSource]], AsyncObservable[_TResult]]:
-    def _operator(source: AsyncObservable[_TSource]) -> AsyncObservable[_TResult]:
-        from .filtering import take_last
-
-        return pipe(source, scan_async(accumulator, initial), take_last(1))
-
-    return _operator