message: Fix warnings for GCC v11.1 and Clang v11.1
diff: @@ -226,8 +226,7 @@ namespace fakeit {
  }
  virtual std::function<void()> getOriginalMethod() override {
  - C &instance = MethodMockingContextBase<void>::_mock.get();
  - return [=, &instance]() -> void {
  + return [=]() -> void {
  };
  }
  