Removed '"use strict";' in FFI files

Author: JordanMartinez

Diff for: src/React/Basic.js

@@ -1,5 +1,3 @@
-"use strict";
-
 import React from "react";
 const createElement = React.createElement;
 const Fragment = React.Fragment;

Diff for: src/React/Basic/StrictMode.js

@@ -1,4 +1,2 @@
-"use strict";
-
 import React from "react";
 export const strictMode_ = React.StrictMode;