🎨 小程序代码提交审核代码重构优化，删除重复定义类

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/api/WxMaCodeService.java

@@ -39,7 +39,7 @@ public interface WxMaCodeService {
    * @return List<WxMaCategory>
    * @throws WxErrorException 获取失败时返回，具体错误码请看此接口的注释文档
    */
-  List<WxMaCategory> getCategory() throws WxErrorException;
+  List<WxMaCodeSubmitAuditItem> getCategory() throws WxErrorException;
 
   /**
    * 获取小程序的第三方提交代码的页面配置（仅供第三方开发者代小程序调用）.

weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/api/impl/WxMaCodeServiceImpl.java

@@ -67,13 +67,13 @@ public class WxMaCodeServiceImpl implements WxMaCodeService {
   }
 
   @Override
-  public List<WxMaCategory> getCategory() throws WxErrorException {
+  public List<WxMaCodeSubmitAuditItem> getCategory() throws WxErrorException {
     String responseContent = this.service.get(GET_CATEGORY_URL, null);
     JsonObject jsonObject = GsonParser.parse(responseContent);
     boolean hasCategoryList = jsonObject.has("category_list");
     if (hasCategoryList) {
       return WxMaGsonBuilder.create().fromJson(jsonObject.getAsJsonArray("category_list"),
-        new TypeToken<List<WxMaCategory>>() {
+        new TypeToken<List<WxMaCodeSubmitAuditItem>>() {
         }.getType());
     } else {
       return null;