src: remove unused method in js_stream.h

Signed-off-by: gengjiawen <technicalcute@gmail.com>

PR-URL: #25790
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

Author: gengjiawen

src/js_stream.h

@@ -41,12 +41,6 @@ class JSStream : public AsyncWrap, public StreamBase {
   static void ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void EmitEOF(const v8::FunctionCallbackInfo<v8::Value>& args);
 
-  static void OnAllocImpl(size_t size, uv_buf_t* buf, void* ctx);
-  static void OnReadImpl(ssize_t nread,
-                         const uv_buf_t* buf,
-                         uv_handle_type pending,
-                         void* ctx);
-
   template <class Wrap>
   static void Finish(const v8::FunctionCallbackInfo<v8::Value>& args);
 };