refactor(auth): 移除未使用的手机号登录方式常量

开源版无短信登录实现，删除 AuthLoginTypeCode.PHONE 预留常量。

daxpay-platform/daxpay-platform-capability/capability-auth/src/main/java/cn/daxpay/open/platform/capability/auth/code/AuthLoginTypeCode.java

@@ -21,9 +21,6 @@ public interface AuthLoginTypeCode {
     /// 账号密码登录(GoView)
     String PASSWORD_GO_VIEW = "passwordGoView";
 
-    /// 手机号登录
-    String PHONE = "phone";
-
     /// 微信登录(公众号)
     String WE_CHAT = "weChat";