Remove unused and not compiling DropDownDemo

For ease of use the simulator uses a globbing expression to get all
screens source files. This one was picked up as well and lead to a
compilation error.

src/CMakeLists.txt

@@ -626,7 +626,6 @@ set(INCLUDE_FILES
         displayapp/screens/InfiniPaint.h
         displayapp/screens/StopWatch.h
         displayapp/screens/Paddle.h
-        displayapp/screens/DropDownDemo.h
         displayapp/screens/BatteryIcon.h
         displayapp/screens/BleIcon.h
         displayapp/screens/NotificationIcon.h

src/displayapp/screens/DropDownDemo.cpp

@@ -1,57 +0,0 @@
-#include "displayapp/screens/DropDownDemo.h"
-#include <lvgl/lvgl.h>
-#include <libraries/log/nrf_log.h>
-#include "displayapp/DisplayApp.h"
-
-using namespace Pinetime::Applications::Screens;
-
-DropDownDemo::DropDownDemo(Pinetime::Applications::DisplayApp* app) : Screen(app) {
-  // Create the dropdown object, with many item, and fix its height
-  ddlist = lv_ddlist_create(lv_scr_act(), nullptr);
-  lv_ddlist_set_options(ddlist,
-                        "Apple\n"
-                        "Banana\n"
-                        "Orange\n"
-                        "Melon\n"
-                        "Grape\n"
-                        "Raspberry\n"
-                        "A\n"
-                        "B\n"
-                        "C\n"
-                        "D\n"
-                        "E");
-  lv_ddlist_set_fix_width(ddlist, 150);
-  lv_ddlist_set_draw_arrow(ddlist, true);
-  lv_ddlist_set_fix_height(ddlist, 150);
-  lv_obj_align(ddlist, nullptr, LV_ALIGN_IN_TOP_MID, 0, 20);
-}
-
-DropDownDemo::~DropDownDemo() {
-  // Reset the touchmode
-  app->SetTouchMode(DisplayApp::TouchModes::Gestures);
-  lv_obj_clean(lv_scr_act());
-}
-
-bool DropDownDemo::Refresh() {
-  auto* list = static_cast<lv_ddlist_ext_t*>(ddlist->ext_attr);
-
-  // Switch touchmode to Polling if the dropdown is opened. This will allow to scroll inside the
-  // dropdown while it is opened.
-  // Disable the polling mode when the dropdown is closed to be able to handle the gestures.
-  if (list->opened)
-    app->SetTouchMode(DisplayApp::TouchModes::Polling);
-  else
-    app->SetTouchMode(DisplayApp::TouchModes::Gestures);
-  return running;
-}
-
-bool DropDownDemo::OnTouchEvent(Pinetime::Applications::TouchEvents event) {
-  // If the dropdown is opened, notify Display app that it doesn't need to handle the event
-  // (this will prevent displayApp from going back to the menu or clock scree).
-  auto* list = static_cast<lv_ddlist_ext_t*>(ddlist->ext_attr);
-  if (list->opened) {
-    return true;
-  } else {
-    return false;
-  }
-}

src/displayapp/screens/DropDownDemo.h

@@ -1,27 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include "displayapp/screens/Screen.h"
-#include <lvgl/src/lv_core/lv_obj.h>
-
-namespace Pinetime {
-  namespace Applications {
-    namespace Screens {
-
-      class DropDownDemo : public Screen {
-      public:
-        DropDownDemo(DisplayApp* app);
-        ~DropDownDemo() override;
-
-        bool Refresh() override;
-
-        bool OnTouchEvent(TouchEvents event) override;
-
-      private:
-        lv_obj_t* ddlist;
-
-        bool isDropDownOpened = false;
-      };
-    }
-  }
-}