Remove unused BUFSIZE variable

Change-Id: I84f186a83a7c800048f68350a55d5bad5b032970
Signed-off-by: Ravi Teja <raviteja28031990@gmail.com>
diff --git a/src/rtnetlink_server.hpp b/src/rtnetlink_server.hpp
index 7e06494..3e7c44b 100644
--- a/src/rtnetlink_server.hpp
+++ b/src/rtnetlink_server.hpp
@@ -11,8 +11,6 @@
 namespace netlink
 {
 
-constexpr auto BUFSIZE = 4096;
-
 /** General rtnetlink server which waits for the POLLIN event
     and calls the  call back once it gets the event.
     Usage would be create the server with the  call back