no need to combine sub-router params any more

router.go

@@ -50,16 +50,6 @@ func (r Router) Handler(ctx context.Context, request *Request) *Response {
 		return nil
 	}
 
-	// as we may be a sub-router, check for existing stashed params
-	// and combine with that map if found.
-	priorParams := RouteParams(ctx)
-	for k, v := range priorParams {
-		if k == subrouterPathKey {
-			continue
-		}
-		params[k] = v
-	}
-
 	return handler(context.WithValue(ctx, routeParamsKey, params), request)
 }
 
@@ -114,8 +104,6 @@ func RouteParams(ctx context.Context) map[string]string {
 	return nil
 }
 
-const subrouterPathKey = "subrouter_path"
-
 type routeParamsKeyType struct{}
 
 var routeParamsKey = routeParamsKeyType{}