Remove the weird backronym from readme

Author: horenmar

README.md

@@ -19,9 +19,8 @@ before moving to Catch2. You might also like to read [this blog post](https://le
 
 ## What's the Catch?
 
-Catch2 stands for C++ Automated Test Cases in a Header and is a
-multi-paradigm test framework for C++. which also supports Objective-C
-(and maybe C).
+Catch2 is a multi-paradigm test framework for C++. which also supports
+Objective-C (and maybe C).
 It is primarily distributed as a single header file, although certain
 extensions may require additional headers.