Updating golang dependancies (#4075)

vendor/github.com/gorilla/mux/route.go

@@ -26,9 +26,6 @@ type Route struct {
 	// If true, when the path pattern is "/path/", accessing "/path" will
 	// redirect to the former and vice versa.
 	strictSlash bool
-	// If true, when the path pattern is "/path//to", accessing "/path//to"
-	// will not redirect
-	skipClean bool
 	// If true, this route never matches: it is only used to build URLs.
 	buildOnly bool
 	// The name used to build URLs.
@@ -39,10 +36,6 @@ type Route struct {
 	buildVarsFunc BuildVarsFunc
 }
 
-func (r *Route) SkipClean() bool {
-	return r.skipClean
-}
-
 // Match matches the route against the request.
 func (r *Route) Match(req *http.Request, match *RouteMatch) bool {
 	if r.buildOnly || r.err != nil {