【opt】opt import

Author: FlechazoW

core/src/main/java/com/dtstack/flink/sql/table/AbstractSourceTableInfo.java

@@ -21,13 +21,9 @@
 package com.dtstack.flink.sql.table;
 
 import com.google.common.base.Strings;
-import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
-import org.apache.flink.util.StringUtils;
 
-import java.util.ArrayList;
 import java.util.Map;
-import java.util.TimeZone;
 
 /**
  * Reason:

core/src/main/java/com/dtstack/flink/sql/watermarker/AbstractCustomerWaterMarker.java

@@ -29,8 +29,6 @@
 import org.apache.flink.streaming.api.functions.timestamps.BoundedOutOfOrdernessTimestampExtractor;
 import org.apache.flink.streaming.api.windowing.time.Time;
 
-import java.util.TimeZone;
-
 /**
  * Reason:
  * Date: 2018/10/18

core/src/main/java/com/dtstack/flink/sql/watermarker/CustomerWaterMarkerForLong.java

@@ -26,8 +26,6 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.TimeZone;
-
 /**
  * Custom watermark --- for eventtime
  * Date: 2017/12/28