Actually delete saves/unlock.vvv in deletestats()

Having to blank everything out in the stats file is very kludge-y.

desktop_version/src/Game.cpp

@@ -4215,6 +4215,12 @@ void Game::gethardestroom()
 
 void Game::deletestats()
 {
+    if (!FILESYSTEM_delete("saves/unlock.vvv"))
+    {
+        puts("Error deleting saves/unlock.vvv");
+    }
+    else
+    {
         for (int i = 0; i < 25; i++)
         {
             unlock[i] = false;
@@ -4229,7 +4235,7 @@ void Game::deletestats()
         }
         graphics.setflipmode = false;
         stat_trinkets = 0;
-    savestats();
+    }
 }
 
 void Game::unlocknum( int t )