Remove redundant toString

Change-Id: I9c46520c1d5edc016335ef20a9068c1a6bfbb51f
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServlet.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServlet.java
index cade024..5059907 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServlet.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServlet.java
@@ -53,7 +53,7 @@
     try {
       if (!MediaType.parse(req.getContentType()).is(JSON_UTF_8)) {
         sendError(
-            rsp, SC_UNSUPPORTED_MEDIA_TYPE, "Expecting " + JSON_UTF_8.toString() + " content type");
+            rsp, SC_UNSUPPORTED_MEDIA_TYPE, "Expecting " + JSON_UTF_8 + " content type");
         return;
       }
       forwardedEventHandler.dispatch(getEventFromRequest(req));