Remove unused EventFactory import

Change-Id: I4240be8342ae5f407ad7507a2e15a550330e40f0
diff --git a/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java b/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
index 8c49cf4..a482eaf 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/automerger/AutomergeChangeAction.java
@@ -22,7 +22,6 @@
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.change.RevisionResource;
-import com.google.gerrit.server.events.EventFactory;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 import java.io.IOException;