Remove Game::shouldreturntopausemenu

This kludge variable was used to re-set the warp background after coming
back from the in-game settings menus. But since #522 got merged, this
has no longer been necessary.

desktop_version/src/Game.cpp

@@ -377,7 +377,6 @@ void Game::init(void)
 
     ingame_titlemode = false;
     kludge_ingametemp = Menu::mainmenu;
-    shouldreturntopausemenu = false;
 
     disablepause = false;
 }
@@ -7155,7 +7154,6 @@ void Game::returntopausemenu()
     {
         obj.flags[73] = true;
     }
-    shouldreturntopausemenu = true;
 }
 
 void Game::unlockAchievement(const char *name) {

desktop_version/src/Game.h

@@ -433,7 +433,6 @@ public:
 
     bool ingame_titlemode;
 
-    bool shouldreturntopausemenu;
     void returntopausemenu();
     void unlockAchievement(const char *name);
 

desktop_version/src/Logic.cpp

@@ -87,16 +87,6 @@ void maplogic()
     graphics.updatetextboxes();
     graphics.updatetitlecolours();
 
-    if (game.shouldreturntopausemenu)
-    {
-        game.shouldreturntopausemenu = false;
-        graphics.backgrounddrawn = false;
-        if (map.background == 3 || map.background == 4)
-        {
-            graphics.updatebackground(map.background);
-        }
-    }
-
     graphics.crewframedelay--;
     if (graphics.crewframedelay <= 0)
     {