Revert "src: let http2 streams end after session close"

This reverts commit dee882e.

As it's causing: nodejs#46234.
nodejs#42713 to be reopened.

src/node_http2.cc

@@ -1124,17 +1124,6 @@ int Http2Session::OnStreamClose(nghttp2_session* handle,
   if (!stream || stream->is_destroyed())
     return 0;
 
-  // Don't close synchronously in case there's pending data to be written. This
-  // may happen when writing trailing headers.
-  if (code == NGHTTP2_NO_ERROR && nghttp2_session_want_write(handle) &&
-      env->can_call_into_js()) {
-    env->SetImmediate([handle, id, code, user_data](Environment* env) {
-      OnStreamClose(handle, id, code, user_data);
-    });
-
-    return 0;
-  }
-
   stream->Close(code);
 
   // It is possible for the stream close to occur before the stream is