Remove useless code from `ArrayList`

sources/Data/Collections/ArrayList.uc

@@ -247,20 +247,15 @@ public final function ArrayList RemoveIndex(int index)
 }
 
 /**
- *  Validates item at `index`: in case it was erroneously deallocated while
- *  being stored in caller `ArrayList` - forgets stored `AcediaObject`
- *  reference.
+ *  Validates item at `index`: whether it fits in current array bounds.
  *
- *  @param  index   Index of an item to validate/
+ *  @param  index   Index of an item to validate.
  *  @return `true` if `index` is valid for `storedObjects` array.
  */
 private final function bool ValidateIndex(int index)
 {
-    local AcediaObject item;
-
     if (index < 0)                      return false;
     if (index >= storedObjects.length)  return false;
-    item = storedObjects[index];
 
     return true;
 }