Remove obsolete warning about events cancellation

Now that replication events are persisted across restarts
the warning of cancellation is obsolete and misleading.

Change-Id: Ia5e2205ae3b8779a6741541c7003f2f47c8e3fce
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/Destination.java b/src/main/java/com/googlesource/gerrit/plugins/replication/Destination.java
index b69bab6..ada45a0 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/Destination.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/Destination.java
@@ -217,8 +217,6 @@
   public int shutdown() {
     int cnt = 0;
     if (pool != null) {
-      repLog.warn("Cancelling replication events");
-
       cnt = pool.shutdownNow().size();
       pool = null;
     }