ibm: remove unused tinyxml2 include

Fixes openbmc/bmcweb#226.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Id8d30c23556fe445c3233f47406d14a6173d568c
diff --git a/include/ibm/management_console_rest.hpp b/include/ibm/management_console_rest.hpp
index d6a4992..59d4111 100644
--- a/include/ibm/management_console_rest.hpp
+++ b/include/ibm/management_console_rest.hpp
@@ -1,5 +1,4 @@
 #pragma once
-#include <tinyxml2.h>
 
 #include <app.hpp>
 #include <async_resp.hpp>