Simplify readme

Author: florianpircher

README.md

@@ -10,7 +10,6 @@ A Swift package for a type `Delta<Element>` with three cases:
 
 This `Delta` type represents an inclusive OR relation: Either a source element is available, or a target element is available, or both are available.
 `Delta` behaves similar to `Optional`, but instead of representing 0 or 1 elements, it represents 1 or 2 elements.
-An alternative name for this type in some other languages is `These`.
 
 ## Implementation