Remove lcd from DisplayApp

Author: Riksu9000

src/displayapp/DisplayApp.cpp

@@ -163,12 +163,10 @@ void DisplayApp::Refresh() {
           brightnessController.Lower();
           vTaskDelay(100);
         }
-        lcd.DisplayOff();
         PushMessageToSystemTask(Pinetime::System::Messages::OnDisplayTaskSleeping);
         state = States::Idle;
         break;
       case Messages::GoToRunning:
-        lcd.DisplayOn();
         brightnessController.Restore();
         state = States::Running;
         break;

src/drivers/St7789.h

@@ -22,9 +22,6 @@ namespace Pinetime {
 
       void DrawBuffer(uint16_t x, uint16_t y, uint16_t width, uint16_t height, const uint8_t* data, size_t size);
 
-      void DisplayOn();
-      void DisplayOff();
-
       void Sleep();
       void Wakeup();
 
@@ -42,6 +39,9 @@ namespace Pinetime {
       void DisplayInversionOn();
       void NormalModeOn();
       void WriteToRam();
+      void DisplayOn();
+      void DisplayOff();
+
       void SetAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1);
       void SetVdv();
       void WriteCommand(uint8_t cmd);