Revert "Add system interface as the channel for the legacy interface"

This reverts commit 152e98cd339f3df58d5832af5779eff541f0adc5.

Change-Id: Ib36cdbb2d140de749335a3ae9cbb279563c33a1c
diff --git a/ipmid-new.cpp b/ipmid-new.cpp
index 823b9d8..c32ba3f 100644
--- a/ipmid-new.cpp
+++ b/ipmid-new.cpp
@@ -750,8 +750,7 @@
         m.read(seq, netFn, lun, cmd, data);
         std::shared_ptr<sdbusplus::asio::connection> bus = getSdBus();
         auto ctx = std::make_shared<ipmi::Context>(
-            bus, netFn, cmd, ipmi::channelSystemIface, 0,
-            ipmi::Privilege::Admin, 0, &yield);
+            bus, netFn, cmd, 0, 0, ipmi::Privilege::Admin, 0, &yield);
         auto request = std::make_shared<ipmi::message::Request>(
             ctx, std::forward<std::vector<uint8_t>>(data));
         ipmi::message::Response::ptr response =