Remove duplicate stack trace logging

logging at severe level with cause already shows the stack and the
message of the error.

Logging this explicitly would cause the stack trace to be logged twice.

Change-Id: I3cc0a4fdc7349db3712a28d1e963c51cdd702193
diff --git a/src/main/java/com/gerritforge/gerrit/eventbroker/publisher/StreamEventPublisher.java b/src/main/java/com/gerritforge/gerrit/eventbroker/publisher/StreamEventPublisher.java
index 5e49696..e1d1398 100644
--- a/src/main/java/com/gerritforge/gerrit/eventbroker/publisher/StreamEventPublisher.java
+++ b/src/main/java/com/gerritforge/gerrit/eventbroker/publisher/StreamEventPublisher.java
@@ -84,8 +84,7 @@
           brokerMetrics.get().incrementBrokerFailedToPublishMessage();
         } catch (Throwable e) {
           log.atSevere().withCause(e).log(
-              "Failed to publish event '%s' to topic '%s' - error: %s - stack trace: %s",
-              event, streamEventTopic, e.getMessage(), e.getStackTrace());
+              "Failed to publish event '%s' to topic '%s'", event, streamEventTopic);
           brokerMetrics.get().incrementBrokerFailedToPublishMessage();
         }
       }