refactor: 删除 UserLoginBo 类，简化用户登录模型

src/main/java/work/baiyun/chronicdiseaseapp/model/bo/UserLoginBo.java

@@ -1,11 +0,0 @@
-package work.baiyun.chronicdiseaseapp.model.bo;
-
-import io.swagger.v3.oas.annotations.media.Schema;
-
-public class UserLoginBo {
-    @Schema(description = "")
-    private String wxOpenid;
-    /** 密码;密码 */
-    @Schema(description = "密码")
-    private String wxSessionKey;
-}