diff --git a/roboquant/src/main/kotlin/org/roboquant/common/TimeSpan.kt b/roboquant/src/main/kotlin/org/roboquant/common/TimeSpan.kt
index 0b0cc609..f4b01953 100644
--- a/roboquant/src/main/kotlin/org/roboquant/common/TimeSpan.kt
+++ b/roboquant/src/main/kotlin/org/roboquant/common/TimeSpan.kt
@@ -20,7 +20,6 @@ package org.roboquant.common
 
 import java.time.*
 import java.time.temporal.ChronoUnit
-import java.time.temporal.TemporalUnit
 
 /**
  * Deprecated, use [TimeSpan] instead