Fix UnusedVariable bug pattern issues

We want to enable the UnusedVariable bug pattern in ErrorProne. For this
we need to fix the current issues.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Ic8620c45e7a67129326eb46b632a23a3327d8deb

src/main/java/com/googlesource/gerrit/plugins/replication/StartCommand.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/StartCommand.java b/src/main/java/com/googlesource/gerrit/plugins/replication/StartCommand.java
index fa8b44c..f63df98 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/StartCommand.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/StartCommand.java
@@ -60,7 +60,6 @@
     }
 
     ReplicationState state = new ReplicationState(new CommandProcessing(this));
-    Future<?> future = null;
 
     ReplicationFilter projectFilter;
 
@@ -70,7 +69,8 @@
       projectFilter = new ReplicationFilter(projectPatterns);
     }
 
-    future = pushFactory.create(urlMatch, projectFilter, state, now).schedule(0, TimeUnit.SECONDS);
+    Future<?> future =
+        pushFactory.create(urlMatch, projectFilter, state, now).schedule(0, TimeUnit.SECONDS);
 
     if (wait) {
       if (future != null) {