Only render log HTML once

Since f6dcf7a56580 ("Display logs in a streaming fashion", 2014-07-30)
log is rendered in a streaming mode and should not be sent a second
time after the response has been committed by the servlet container.

Change-Id: I64a7d1600b14a4bc228a1b78cce735ac2a1050fa
diff --git a/gitiles-servlet/src/main/java/com/google/gitiles/LogServlet.java b/gitiles-servlet/src/main/java/com/google/gitiles/LogServlet.java
index 3754d60..5b147b3 100644
--- a/gitiles-servlet/src/main/java/com/google/gitiles/LogServlet.java
+++ b/gitiles-servlet/src/main/java/com/google/gitiles/LogServlet.java
@@ -121,8 +121,6 @@
             .renderStreaming(paginator, null, renderer, w, df);
         w.flush();
       }
-
-      renderHtml(req, res, "gitiles.logDetail", data);
     } catch (RevWalkException e) {
       log.warn("Error in rev walk", e);
       res.setStatus(SC_INTERNAL_SERVER_ERROR);