writefrudata.cpp: drop unused, add used header

Drop the sdbusplus/server.hpp for sdbusplus/bus.hpp header.

Change-Id: I8ea1ae95812ceb911ac6f70f259b5884e0c4ab3b
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/writefrudata.cpp b/writefrudata.cpp
index ffe53c0..a53859b 100644
--- a/writefrudata.cpp
+++ b/writefrudata.cpp
@@ -17,7 +17,7 @@
 #include <map>
 #include <memory>
 #include <phosphor-logging/log.hpp>
-#include <sdbusplus/server.hpp>
+#include <sdbusplus/bus.hpp>
 #include <sstream>
 #include <vector>