Revert "New API to return user photos."

This reverts commit ba1f458907.

src/main/java/icu/samnyan/aqua/api/model/resp/sega/maimai2/PhotoResp.java

@@ -1,14 +0,0 @@
-package icu.samnyan.aqua.api.model.resp.sega.maimai2;
-
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.NoArgsConstructor;
-
-@Data
-@AllArgsConstructor
-@NoArgsConstructor
-public class PhotoResp {
-    private int imageIndex;
-    private int totalImage;
-    private String divData;
-}