wasi: fix WasiFunction fast call signature

PR-URL: https://github.com/nodejs/node/pull/59600
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

src/node_wasi.cc

@@ -266,7 +266,6 @@ inline void EinvalError() {}
 
 template <typename FT, FT F, typename R, typename... Args>
 R WASI::WasiFunction<FT, F, R, Args...>::FastCallback(
-    Local<Object> unused,
     Local<Object> receiver,
     Args... args,
     // NOLINTNEXTLINE(runtime/references) This is V8 api.

src/node_wasi.h

@@ -160,8 +160,7 @@ class WASI : public BaseObject,
                             v8::Local<v8::FunctionTemplate>);
 
    private:
-    static R FastCallback(v8::Local<v8::Object> unused,
-                          v8::Local<v8::Object> receiver,
+    static R FastCallback(v8::Local<v8::Object> receiver,
                           Args...,
                           v8::FastApiCallbackOptions&);