Remove bad include from dbus singleton

Neither of these files make use of io_context, so they shouldn't be here

Tested: Code compiles

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I86c195a5881a50a275e977aa73b9d7144b53844b
diff --git a/include/dbus_singleton.hpp b/include/dbus_singleton.hpp
index f9b50b0..67f57b7 100644
--- a/include/dbus_singleton.hpp
+++ b/include/dbus_singleton.hpp
@@ -1,5 +1,4 @@
 #pragma once
-#include <boost/asio/io_context.hpp>
 #include <sdbusplus/asio/connection.hpp>
 
 namespace crow
diff --git a/src/dbus_singleton.cpp b/src/dbus_singleton.cpp
index 726c3d4..b3b808b 100644
--- a/src/dbus_singleton.cpp
+++ b/src/dbus_singleton.cpp
@@ -1,7 +1,5 @@
 #include "dbus_singleton.hpp"
 
-#include <boost/asio/io_context.hpp>
-
 namespace crow
 {
 namespace connections