Remove unused imports.

Change-Id: I07ae8a1e3391b02b53873743bb4c0301f7a59af9
diff --git a/src/main/java/com/googlesource/gerrit/plugins/automerger/DownstreamCreator.java b/src/main/java/com/googlesource/gerrit/plugins/automerger/DownstreamCreator.java
index 6854143..5a8e380 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/automerger/DownstreamCreator.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/automerger/DownstreamCreator.java
@@ -24,7 +24,6 @@
 import com.google.gerrit.extensions.api.changes.ReviewInput;
 import com.google.gerrit.extensions.client.ChangeStatus;
 import com.google.gerrit.extensions.client.ListChangesOption;
-import com.google.gerrit.extensions.common.ApprovalInfo;
 import com.google.gerrit.extensions.common.ChangeInfo;
 import com.google.gerrit.extensions.common.ChangeInput;
 import com.google.gerrit.extensions.common.CommitInfo;
@@ -48,7 +47,6 @@
 import com.google.inject.Inject;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Comparator;
 import java.util.EnumSet;
 import java.util.HashMap;
 import java.util.List;