LibWeb/HTML: Port Window.localStorage to IDL

Author: https://github.com/linusg
Commit: 37e9302dd9
Pull-request: https://github.com/SerenityOS/serenity/pull/17752
Reviewed-by: https://github.com/awesomekling

Userland/Libraries/LibWeb/HTML/Window.h

@@ -253,7 +253,6 @@ private:
 
     JS_DECLARE_NATIVE_FUNCTION(structured_clone);
 
-    JS_DECLARE_NATIVE_FUNCTION(local_storage_getter);
     JS_DECLARE_NATIVE_FUNCTION(session_storage_getter);
 
     JS_DECLARE_NATIVE_FUNCTION(set_interval);