Remove SourceLevel mention on README

Remove SourceLevel

Author: georgeguimaraes

README.md

@@ -48,7 +48,6 @@ Some IDEs and editors are able to run Credo in the background and mark issues in
 ### Automated Code Review
 
 * [Codacy](https://www.codacy.com/) - checks your code from style to security, duplication, complexity, and also integrates with coverage.
-* [SourceLevel](https://sourcelevel.io/) - tracks how your code changes over time and have this information accessible to your whole team.
 * [Stickler CI](https://stickler-ci.com/) - checks your code for style and best practices across your entire stack.
 
 ## Contributing