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[FLINK-7438][build]Remove useless import, avoid warnings #4570

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[FLINK-7438][build]Remove useless import, avoid warnings #4570

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2 changes: 1 addition & 1 deletion ...reaming-scala/src/main/scala/org/apache/flink/streaming/api/scala/AllWindowedStream.scala
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Expand Up @@ -30,7 +30,7 @@ import org.apache.flink.streaming.api.windowing.evictors.Evictor
import org.apache.flink.streaming.api.windowing.time.Time
import org.apache.flink.streaming.api.windowing.triggers.Trigger
import org.apache.flink.streaming.api.windowing.windows.Window
import org.apache.flink.util.{Collector, OutputTag}
import org.apache.flink.util.Collector
import org.apache.flink.util.Preconditions.checkNotNull

/**
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2 changes: 1 addition & 1 deletion flink-streaming-scala/src/main/scala/org/apache/flink/streaming/api/scala/DataStream.scala
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Expand Up @@ -39,7 +39,7 @@ import org.apache.flink.streaming.api.windowing.assigners._
import org.apache.flink.streaming.api.windowing.time.Time
import org.apache.flink.streaming.api.windowing.windows.{GlobalWindow, TimeWindow, Window}
import org.apache.flink.streaming.util.serialization.SerializationSchema
import org.apache.flink.util.{Collector, OutputTag}
import org.apache.flink.util.Collector

import scala.collection.JavaConverters._

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2 changes: 1 addition & 1 deletion ...-streaming-scala/src/main/scala/org/apache/flink/streaming/api/scala/WindowedStream.scala
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Expand Up @@ -30,7 +30,7 @@ import org.apache.flink.streaming.api.windowing.evictors.Evictor
import org.apache.flink.streaming.api.windowing.time.Time
import org.apache.flink.streaming.api.windowing.triggers.Trigger
import org.apache.flink.streaming.api.windowing.windows.Window
import org.apache.flink.util.{Collector, OutputTag}
import org.apache.flink.util.Collector

/**
* A [[WindowedStream]] represents a data stream where elements are grouped by
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