Depenancy upgrades and movign to dep. (#8630)

vendor/github.com/gorilla/context/README.md

@@ -4,7 +4,4 @@ context
 
 gorilla/context is a general purpose registry for global request variables.
 
-> Note: gorilla/context, having been born well before `context.Context` existed, does not play well
-> with the shallow copying of the request that [`http.Request.WithContext`](https://golang.org/pkg/net/http/#Request.WithContext) (added to net/http Go 1.7 onwards) performs. You should either use *just* gorilla/context, or moving forward, the new `http.Request.Context()`.
-
 Read the full documentation here: http://www.gorillatoolkit.org/pkg/context