Replace boost::optional with std::optional where possible

src/input_common/udp/udp.cpp

@@ -42,7 +42,7 @@ public:
     std::unique_ptr<Input::TouchDevice> Create(const Common::ParamPackage& params) override {
         {
             std::lock_guard<std::mutex> guard(status->update_mutex);
-            status->touch_calibration.reset({});
+            status->touch_calibration.reset();
             // These default values work well for DS4 but probably not other touch inputs
             status->touch_calibration->min_x = params.Get("min_x", 100);
             status->touch_calibration->min_y = params.Get("min_y", 50);