diff --git a/proposal/mutant/src/java/antlibs/system/org/apache/ant/antlib/system/Ref.java b/proposal/mutant/src/java/antlibs/system/org/apache/ant/antlib/system/Ref.java
index 1794bd50e..7a689ea32 100644
--- a/proposal/mutant/src/java/antlibs/system/org/apache/ant/antlib/system/Ref.java
+++ b/proposal/mutant/src/java/antlibs/system/org/apache/ant/antlib/system/Ref.java
@@ -53,10 +53,8 @@
  */
 package org.apache.ant.antlib.system;
 import java.io.File;
-import org.apache.ant.common.antlib.AbstractTask;
 import org.apache.ant.common.antlib.AntContext;
 import org.apache.ant.common.model.Project;
-import org.apache.ant.common.service.ExecService;
 import org.apache.ant.common.util.ExecutionException;
 
 /**