Remove unuse import.

1 files changed, 0 insertions, 1 deletions

diff --git a/document/src/main/java/com/yahoo/document/DocumentType.java b/document/src/main/java/com/yahoo/document/DocumentType.java
index 08b0fe94046..a616c853bf4 100755
--- a/document/src/main/java/com/yahoo/document/DocumentType.java
+++ b/document/src/main/java/com/yahoo/document/DocumentType.java
@@ -13,7 +13,6 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;