Removed note about #407. [ci skip]

Author: dblock

README.md

@@ -48,8 +48,6 @@ grape-swagger | swagger spec | grape                   | grape-entity
 0.20.1        |     2.0      | >= 0.12.0 ... <= 0.14.0 | <= 0.5.1
 0.20.3 (next) |     2.0      | >= 0.12.0 ... <= 0.16.2 | <= 0.5.1
 
-Swagger 2.0 support is currently not available for Grape 0.16.x. Please contribute to [#407](https://github.com/ruby-grape/grape-swagger/issues/407).
-
 <a name="swagger-spec" />
 ## Swagger-Spec