diff --git a/libs/binder/include/binder/Nullable.h b/libs/binder/include/binder/Nullable.h
deleted file mode 100644
index a98583d..0000000
--- a/libs/binder/include/binder/Nullable.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#pragma once
-
-#include <optional>
-#include <utility>
-
-namespace android {
-
-namespace aidl {
-
-// nullable/make_nullable provide source-level compatibility between std::opional and std::unique_ptr
-// usage:
-//     nullable<Foo> a;
-//     nullable<Foo> b = make_nullable<Foo>(...);
-//     auto c = make_nullable<Foo>(...);
-//     c.reset();
-//     c = make_nullable<Foo>(...);
-//     c = std::move(a);
-
-template <typename T>
-using nullable = std::optional<T>;
-
-template <typename T, typename... Args>
-inline nullable<T> make_nullable(Args&&... args) {
-    return std::make_optional<T>(std::forward<Args>(args)...);
-}
-
-} // namespace aidl
-
-} // namespace android
\ No newline at end of file