Update IteratorSerializerModule.scala

Author: pjfanning

src/main/scala/com/fasterxml/jackson/module/scala/ser/IteratorSerializerModule.scala

@@ -9,7 +9,7 @@ import com.fasterxml.jackson.databind._
 import com.fasterxml.jackson.databind.`type`.CollectionLikeType
 import com.fasterxml.jackson.databind.jsontype.TypeSerializer
 import com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase
-import com.fasterxml.jackson.databind.ser.{Serializers, impl}
+import com.fasterxml.jackson.databind.ser.Serializers
 import com.fasterxml.jackson.module.scala.modifiers.IteratorTypeModifierModule
 
 private trait IteratorSerializer