diff --git a/core/src/main/java/hudson/WebAppMain.java b/core/src/main/java/hudson/WebAppMain.java
index 07e679dc49..0f92209129 100644
--- a/core/src/main/java/hudson/WebAppMain.java
+++ b/core/src/main/java/hudson/WebAppMain.java
@@ -27,9 +27,6 @@ import com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider
 import com.thoughtworks.xstream.core.JVM;
 import hudson.model.Hudson;
 import jenkins.model.Jenkins;
-import hudson.model.User;
-import hudson.triggers.SafeTimerTask;
-import hudson.triggers.Trigger;
 import hudson.util.HudsonIsLoading;
 import hudson.util.IncompatibleServletVersionDetected;
 import hudson.util.IncompatibleVMDetected;