diff --git a/core/src/main/java/hudson/model/Executor.java b/core/src/main/java/hudson/model/Executor.java
index 1815a31db84017a3f8f3db0ab6d6bc5a6caad3ce..5268f48c7d020ec6b8fecd6fd970bd645ffd9455 100644
--- a/core/src/main/java/hudson/model/Executor.java
+++ b/core/src/main/java/hudson/model/Executor.java
@@ -38,7 +38,6 @@ import hudson.security.ACL;
 import jenkins.model.InterruptedBuildAction;
 import jenkins.model.Jenkins;
 import org.acegisecurity.Authentication;
-import org.acegisecurity.context.SecurityContext;
 import org.acegisecurity.providers.anonymous.AnonymousAuthenticationToken;
 import org.kohsuke.stapler.HttpResponse;
 import org.kohsuke.stapler.HttpResponses;
@@ -46,7 +45,6 @@ import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.StaplerResponse;
 import org.kohsuke.stapler.export.ExportedBean;
 import org.kohsuke.stapler.export.Exported;
-import org.acegisecurity.context.SecurityContextHolder;
 
 import javax.servlet.ServletException;
 import java.io.IOException;
@@ -58,7 +56,6 @@ import java.util.logging.Level;
 import java.lang.reflect.Method;
 
 import static hudson.model.queue.Executables.*;
-import static java.util.Arrays.asList;
 import static java.util.logging.Level.FINE;