Remove extraneous ui. prefixes

Marlin/src/lcd/HD44780/ultralcd_HD44780.cpp

     void MarlinUI::draw_hotend_status(const uint8_t row, const uint8_t extruder) {
       if (row < LCD_HEIGHT) {
         lcd_moveto(LCD_WIDTH - 9, row);
-        _draw_heater_status(extruder, LCD_STR_THERMOMETER[0], ui.get_blink());
+        _draw_heater_status(extruder, LCD_STR_THERMOMETER[0], get_blink());
       }
     }
 

Marlin/src/lcd/dogm/ultralcd_DOGM.cpp

     u8g.firstPage();
     do {
       u8g.drawBitmapP(offx, offy, (START_BMPWIDTH + 7) / 8, START_BMPHEIGHT, start_bmp);
-      ui.set_font(FONT_MENU);
+      set_font(FONT_MENU);
       #ifndef STRING_SPLASH_LINE2
         const uint8_t txt1X = width - (sizeof(STRING_SPLASH_LINE1) - 1) * (MENU_FONT_WIDTH);
         u8g.drawStr(txt1X, (height + MENU_FONT_HEIGHT) / 2, STRING_SPLASH_LINE1);

Marlin/src/lcd/menu/menu.cpp

     currentScreen = screen;
     encoderPosition = encoder;
     if (screen == status_screen) {
-      ui.defer_status_screen(false);
+      defer_status_screen(false);
       #if ENABLED(AUTO_BED_LEVELING_UBL)
         ubl.lcd_map_control = false;
       #endif