remove deprecated trait's

Author: rez1dent3

changelog.md

@@ -17,6 +17,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - fixed getting a default wallet @MoeCasts
 
+### Removed
+- trait CanBePaid (deprecated ^2.2)
+- trait CanBePaidFloat (deprecated ^2.2)
+
 ## [2.3.2] - 2019-05-13
 ### Fixed
 - patch migrations