完善文件服务

src/main/java/cn/lihongjie/coal/netDisk/controller/NetDiskController.java

@@ -269,7 +269,7 @@ public class NetDiskController {
     @SysLog(action = "remove", message = "id")
     public Object remove(@RequestBody IdRequest request) {
         this.service.remove(request);
-        return null;
+        return true;
     }
 
     /**