Remove Testing Matrix from README (#384)

* Remove Testing Matrix from README

followup #383

Remove the matrix as it is no longer needed.
We could mention support for Ruby 3.2+ and Rails 7.1+ in the README, but for now, I just removed the matrix.

* Add #384 to Changelog

Author: willnet

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changelog
 ## HEAD
 
+* Remove Testing Matrix from README [#384](https://github.com/Sorcery/sorcery/pull/384)
 * Drop support for versions below Ruby 3.2 and Rails 7.1 [#383](https://github.com/Sorcery/sorcery/pull/383)
 * Remove the dependency on OpenStruct in the test code [#382](https://github.com/Sorcery/sorcery/pull/382)
 * Add Ruby 3.4 to CI matrix [#381](https://github.com/Sorcery/sorcery/pull/381)

README.md

@@ -20,16 +20,6 @@ Magical Authentication for Rails. Supports ActiveRecord, DataMapper, Mongoid and
 
 Inspired by Restful Authentication, Authlogic and Devise. Crypto code taken almost unchanged from Authlogic. OAuth code inspired by OmniAuth and Ryan Bates's Railscast about it.
 
-### Testing Matrix
-
-Rails | 6.1 | 7.0 | 7.1 | 7.2 | 8.0 
---- | --- | --- | --- |--- |--- 
-Ruby 3.0 | ✅ | ✅ | ✅ | 🛑 | 🛑 
-Ruby 3.1 | ✅ | ✅ | ✅ | ✅ | 🛑 
-Ruby 3.2 | 🛑 | ✅ | ✅ | ✅ | ✅ 
-Ruby 3.3 | 🛑 | 🛑 | ✅ | ✅ | ✅ 
-Ruby 3.4 | 🛑 | 🛑 | ✅ | ✅ | ✅ 
-
 ### Philosophy
 
 Sorcery is a stripped-down, bare-bones authentication library, with which you can write your own authentication flow. It was built with a few goals in mind: