message: wasm: remove unused Context.
diff: @@ -2814,11 +2814,9 @@ static std::shared_ptr<Wasm> createWasmInternal(
  if (!wasm->initialize(code, vm_id, vm_config.allow_precompiled())) {
  throw WasmException(fmt::format("Failed to initialize WASM code from {}", path));
  }
  - Context* context;
  if (!root_context_for_testing) {
  - context = wasm->start(root_id, vm_config.configuration());
  + wasm->start(root_id, vm_config.configuration());
  } else {
  - context = root_context_for_testing.get();
  wasm->startForTesting(std::move(root_context_for_testing));
  }
  return wasm;
  