remove json packages in app folder

app/router/config_json.go

@@ -0,0 +1,28 @@
+// +build json
+
+package router
+
+import (
+	"encoding/json"
+
+	"github.com/v2ray/v2ray-core/common/log"
+)
+
+func (this *Config) UnmarshalJSON(data []byte) error {
+	type JsonConfig struct {
+		Strategy string          `json:"strategy"`
+		Settings json.RawMessage `json:"settings"`
+	}
+	jsonConfig := new(JsonConfig)
+	if err := json.Unmarshal(data, jsonConfig); err != nil {
+		return err
+	}
+	settings, err := CreateRouterConfig(jsonConfig.Strategy, []byte(jsonConfig.Settings))
+	if err != nil {
+		log.Error("Router: Failed to load router settings: %v", err)
+		return err
+	}
+	this.Strategy = jsonConfig.Strategy
+	this.Settings = settings
+	return nil
+}