fix golint warnings

tools/goctl/api/gogen/gen.go

@@ -148,7 +148,6 @@ func createGoModFileIfNeed(dir string) {
 		}
 		tempPath = filepath.Dir(tempPath)
 		if util.FileExists(filepath.Join(tempPath, goModeIdentifier)) {
-			tempPath = filepath.Dir(tempPath)
 			hasGoMod = true
 			break
 		}

tools/goctl/api/gogen/genhandlers.go

@@ -72,7 +72,7 @@ func genHandler(dir string, group spec.Group, route spec.Route) error {
 		req = ""
 	}
 	var logicResponse string
-	var writeResponse = "nil, nil"
+	var writeResponse string
 	var respWriter = `httpx.WriteJson(w, http.StatusOK, resp)`
 	if len(route.ResponseType.Name) > 0 {
 		logicResponse = "resp, err :="