Remove unused variable bFilamentFirstRun

flash: 0
RAM: -1

Firmware/Marlin_main.cpp

@@ -9746,7 +9746,6 @@ if(0)
 						lcd_update_enable(true);
 */
 						eFilamentAction=FilamentAction::AutoLoad;
-						bFilamentFirstRun=false;
 						if(target_temperature[0] >= extrude_min_temp){
 							bFilamentPreheatState=true;
 //							mFilamentItem(target_temperature[0],target_temperature_bed);

Firmware/ultralcd.cpp

@@ -1833,7 +1833,6 @@ void lcd_set_filament_oq_meass()
 
 
 FilamentAction eFilamentAction=FilamentAction::None; // must be initialized as 'non-autoLoad'
-bool bFilamentFirstRun;
 bool bFilamentPreheatState;
 bool bFilamentAction=false;
 static bool bFilamentWaitingFlag=false;
@@ -2343,7 +2342,6 @@ static void lcd_menu_AutoLoadFilament()
 
 static void preheat_or_continue()
 {
-    bFilamentFirstRun = false;
     if (target_temperature[0] >= extrude_min_temp)
     {
         bFilamentPreheatState = true;
@@ -5584,7 +5582,6 @@ static void mmu_cut_filament_menu()
     else
     {
         eFilamentAction=FilamentAction::MmuCut;
-        bFilamentFirstRun=false;
         if(target_temperature[0] >= extrude_min_temp)
         {
             bFilamentPreheatState=true;
@@ -5983,10 +5980,8 @@ static void lcd_main_menu()
             else
 #endif //FILAMENT_SENSOR
             {
-                bFilamentFirstRun=true;
                 MENU_ITEM_SUBMENU_P(_T(MSG_LOAD_FILAMENT), lcd_LoadFilament);
             }
-            bFilamentFirstRun=true;
             MENU_ITEM_SUBMENU_P(_T(MSG_UNLOAD_FILAMENT), lcd_unLoadFilament);
         }
     MENU_ITEM_SUBMENU_P(_T(MSG_SETTINGS), lcd_settings_menu);

Firmware/ultralcd.h

@@ -182,7 +182,6 @@ enum class FilamentAction : uint_least8_t
 };
 
 extern FilamentAction eFilamentAction;
-extern bool bFilamentFirstRun;
 extern bool bFilamentPreheatState;
 extern bool bFilamentAction;
 void mFilamentItem(uint16_t nTemp,uint16_t nTempBed);