错误码统一进行配置，不作为异常的字段。异常通过 getType 标识不同错误类型。

src/main/java/xyz/zhouxy/plusone/commons/model/dto/UnifiedResponse.java

@@ -24,8 +24,6 @@ import javax.annotation.Nullable;
 
 import com.google.common.base.Preconditions;
 
-import xyz.zhouxy.plusone.commons.base.IWithCode;
-
 /**
  * 统一结果，对返回给前端的数据进行封装。
  *
@@ -70,10 +68,6 @@ public abstract class UnifiedResponse {
         return new ErrorResult(status, e);
     }
 
-    public static <E extends Throwable & IWithCode<?>> UnifiedResponse error(E e) {
-        return new ErrorResult(e);
-    }
-
     public static UnifiedResponse of(Object status, @Nullable String message) {
         return new CustomResult(status, message);
     }
@@ -195,10 +189,6 @@ public abstract class UnifiedResponse {
         ErrorResult(Object status, Throwable e) {
             super(status, Objects.requireNonNull(e).getMessage());
         }
-
-        <E extends Throwable & IWithCode<?>> ErrorResult(E e) {
-            super(e.getCode(), e.getMessage());
-        }
     }
 
     /**