Revert "注册登录,用户等级,社交,动态,新手任务"

This reverts commit 1c359108ca33d46271920ee0cd57dddcb7012937.

Reason for revert: <冲突>

Change-Id: Ie586267169acac99130b1fadf4a5f433441c4b8c
diff --git a/src/main/java/com/example/myproject/service/UserDetailsService.java b/src/main/java/com/example/myproject/service/UserDetailsService.java
new file mode 100644
index 0000000..85d4da2
--- /dev/null
+++ b/src/main/java/com/example/myproject/service/UserDetailsService.java
@@ -0,0 +1,4 @@
+package com.example.myproject.service;
+
+public class UserDetailsService {
+}