SDCARDINSERTED is always defined, and thus we do not need the #ifdefs.

Marlin/ultralcd.cpp

@@ -2295,11 +2295,7 @@ void MainMenu::showSD()
 //         if(force_lcd_update)
 //         {
 //           lcd.setCursor(0,line);
-//            #ifdef CARDINSERTED
 //           if(CARDINSERTED)
-//           #else
-//           if(true)
-//           #endif
 //           {
 //             LCD_PRINT_PGM(" \004Refresh");
 //           }
@@ -2455,11 +2451,7 @@ void MainMenu::showMainMenu()
         if(force_lcd_update) 
         {
           lcd.setCursor(0,line);
-          #ifdef CARDINSERTED
           if(CARDINSERTED)
-          #else
-            if(true)
-          #endif
           {
             if(card.sdprinting)
               LCD_PRINT_PGM(MSG_STOP_PRINT);
@@ -2471,10 +2463,7 @@ void MainMenu::showMainMenu()
            LCD_PRINT_PGM(MSG_NO_CARD); 
           }
         }
-        #ifdef CARDINSERTED
-          if(CARDINSERTED)
-        #endif
-        if((activeline==line)&&CLICKED)
+        if(CARDINSERTED&&(activeline==line)&&CLICKED)
         {
           card.printingHasFinished();
           BLOCK;
@@ -2487,11 +2476,7 @@ void MainMenu::showMainMenu()
             if(force_lcd_update)
             {
                 lcd.setCursor(0,line);
-#ifdef CARDINSERTED
                 if(CARDINSERTED)
-#else
-                    if(true)
-#endif
                 {
                     if(card.sdprinting)
                         LCD_PRINT_PGM(MSG_PAUSE_PRINT);
@@ -2503,10 +2488,7 @@ void MainMenu::showMainMenu()
                     //LCD_PRINT_PGM(MSG_NO_CARD);
                 }
             }
-#ifdef CARDINSERTED
-            if(CARDINSERTED)
-#endif
-                if((activeline==line) && CLICKED)
+            if(CARDINSERTED && (activeline==line) && CLICKED)
             {
                 if(card.sdprinting)
                 {
@@ -2550,8 +2532,9 @@ void MainMenu::update()
 {
   static MainStatus oldstatus=Main_Menu;  //init automatically causes foce_lcd_update=true
   static unsigned long timeoutToStatus=0;
+  #if (SDCARDDETECT > -1)
+    //This code is only relivant if you have an SDcard detect pin.
     static bool oldcardstatus=false;
-  #ifdef CARDINSERTED
     if((CARDINSERTED != oldcardstatus))
     {
       force_lcd_update=true;