Removing privacy information + adding required Flutter version information

docs/src/components/TOCItems/Tree.d.ts

@@ -0,0 +1,11 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+import React from 'react';
+import type { Props } from '@theme/TOCItems/Tree';
+declare function TOCItemTree({ toc, className, linkClassName, isChild,metadata }: Props): JSX.Element | null;
+declare const _default: React.MemoExoticComponent<typeof TOCItemTree>;
+export default _default;