@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2008-2021 Jonathan Schleifer <js@nil.im>
+ * Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
  *
  * All rights reserved.
  *
  * This file is part of ObjFW. It may be distributed under the terms of the
  * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
@@ -385,27 +385,11 @@
 	objc_autoreleasePoolPop(pool);
 
 	return [element autorelease];
 }
 
-- (OFSet *)setBySubtractingSet: (OFSet *)set
-{
-	OFMutableSet *new = [[self mutableCopy] autorelease];
-	[new minusSet: set];
-	[new makeImmutable];
-	return new;
-}
-
-- (OFSet *)setByIntersectingWithSet: (OFSet *)set
-{
-	OFMutableSet *new = [[self mutableCopy] autorelease];
-	[new intersectSet: set];
-	[new makeImmutable];
-	return new;
-}
-
-- (OFSet *)setByAddingSet: (OFSet *)set
+- (OFSet *)setByAddingObjectsFromSet: (OFSet *)set
 {
 	OFMutableSet *new = [[self mutableCopy] autorelease];
 	[new unionSet: set];
 	[new makeImmutable];
 	return new;