Merge pull request #634 from murgatroid99/node_header_fix

Removed reference to non-existent header
diff --git a/src/node/ext/node_grpc.cc b/src/node/ext/node_grpc.cc
index 965186e..9f50958 100644
--- a/src/node/ext/node_grpc.cc
+++ b/src/node/ext/node_grpc.cc
@@ -38,7 +38,6 @@
 
 #include "call.h"
 #include "channel.h"
-#include "event.h"
 #include "server.h"
 #include "completion_queue_async_worker.h"
 #include "credentials.h"