go vet detected error in gherkin lib

gherkin/ast.go

@@ -24,13 +24,11 @@ type Feature struct {
 
 type Comment struct {
 	Node
-	Location *Location `json:"location,omitempty"`
 	Text string `json:"text"`
 }
 
 type Tag struct {
 	Node
-	Location *Location `json:"location,omitempty"`
 	Name string `json:"name"`
 }