Update readme to remove instrution to use global runsetting

***NO_CI***

Author: josesimoes

README.md

@@ -36,10 +36,6 @@ Simply add the `nanoFramework.TestFramework` nuget to your project and you're go
 
 ![test nuget](assets/test-nuget-test-framework.jpg)
 
-Before running tests make sure to check "Auto Detect runsettings Files" from "Test" menu.
-
-![test runsettings](assets/test-auto-detect-runsettings.jpg)
-
 Once you'll build your project, the tests will be automatically discovered:
 
 ![test discovered](assets/test-discovered.jpg)