Refactor to simplify

`CheckAmmoPickup` effectively only contained another function call
and itself was only called once. As it also didn't add to readbility,
it needed to be removed.

sources/Features/FixAmmoSelling/MutatorListener_FixAmmoSelling.uc

@@ -33,7 +33,8 @@ static function bool CheckReplacement(Actor other, out byte isSuperRelevant)
         return false;
     }
     CheckAbusableWeapon(KFWeapon(other));
-    CheckAmmoPickup(KFAmmoPickup(other));
+    //  If it's ammo pickup - we need to stalk it
+    class'AmmoPickupStalker'.static.StalkAmmoPickup(KFAmmoPickup(other));
     return true;
 }
 
@@ -46,12 +47,6 @@ private static function CheckAbusableWeapon(KFWeapon newWeapon)
     ammoSellingFix.FixWeapon(newWeapon);
 }
 
-private static final function CheckAmmoPickup(KFAmmoPickup newAmmoPickup)
-{
-    if (newAmmoPickup == none) return;
-    class'AmmoPickupStalker'.static.StalkAmmoPickup(newAmmoPickup);
-}
-
 //      This function recreates the logic of 'KFWeapon.DropFrom()',
 //  since standard 'ReplaceWith' function produces bad results.
 private static function ReplacePickupWith(Pickup oldPickup)