Improve goreportcard.com results

Author: leonelquinteros

middleware.go

@@ -1,7 +1,5 @@
 package yarf
 
-import ()
-
 // MiddlewareHandler interface provides the methods for request filters
 // that needs to run before, or after, every request Resource is executed.
 type MiddlewareHandler interface {

resource.go

@@ -1,7 +1,5 @@
 package yarf
 
-import ()
-
 // The ResourceHandler interface defines how Resources through the application have to be defined.
 // Ideally, the developer will composite the Resource struct into their own resources,
 // but it's possible to implement each one by their own.