去除无关import

Author: FlechazoW

core/src/main/java/com/dtstack/flink/sql/parser/InsertSqlParser.java

@@ -20,10 +20,17 @@
 
 package com.dtstack.flink.sql.parser;
 
-import org.apache.calcite.config.Lex;
-import org.apache.calcite.sql.*;
-import org.apache.calcite.sql.parser.SqlParseException;
-import org.apache.calcite.sql.parser.SqlParser;
+import org.apache.calcite.sql.SqlInsert;
+import org.apache.calcite.sql.SqlJoin;
+import org.apache.calcite.sql.SqlKind;
+import org.apache.calcite.sql.SqlNode;
+import org.apache.calcite.sql.SqlSelect;
+import org.apache.calcite.sql.SqlNodeList;
+import org.apache.calcite.sql.SqlBasicCall;
+import org.apache.calcite.sql.SqlMatchRecognize;
+import org.apache.calcite.sql.SqlOrderBy;
+import org.apache.calcite.sql.SqlIdentifier;
+import org.apache.calcite.sql.SqlAsOperator;
 import org.apache.calcite.sql.parser.SqlParserPos;
 import org.apache.commons.lang3.StringUtils;
 import com.google.common.collect.Lists;