remove unused exception (#11824)

core/src/main/java/com/alibaba/nacos/core/exception/SnakflowerException.java

@@ -1,46 +0,0 @@
-/*
- * Copyright 1999-2018 Alibaba Group Holding Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.alibaba.nacos.core.exception;
-
-/**
- * SnakflowerException.
- *
- * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
- */
-public class SnakflowerException extends RuntimeException {
-    
-    public SnakflowerException() {
-        super();
-    }
-    
-    public SnakflowerException(String message) {
-        super(message);
-    }
-    
-    public SnakflowerException(String message, Throwable cause) {
-        super(message, cause);
-    }
-    
-    public SnakflowerException(Throwable cause) {
-        super(cause);
-    }
-    
-    protected SnakflowerException(String message, Throwable cause, boolean enableSuppression,
-            boolean writableStackTrace) {
-        super(message, cause, enableSuppression, writableStackTrace);
-    }
-}