diff --git a/slider-core/src/main/java/org/apache/slider/server/appmaster/web/rest/publisher/PublisherResource.java b/slider-core/src/main/java/org/apache/slider/server/appmaster/web/rest/publisher/PublisherResource.java
index e47bbb9..d2ad09e 100644
--- a/slider-core/src/main/java/org/apache/slider/server/appmaster/web/rest/publisher/PublisherResource.java
+++ b/slider-core/src/main/java/org/apache/slider/server/appmaster/web/rest/publisher/PublisherResource.java
@@ -44,7 +44,6 @@
 import java.net.URLClassLoader;
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.Map;
 import java.util.Set;