Revert "Bump classes/system"

This reverts commit 5c98fc7367eef07924c89311f6462091b7864083.

Change-Id: I2e9d11ad7494ea67579906ace3a4cb2034c7897c
diff --git a/classes/system b/classes/system
index 9f2c559..be1bc7b 160000
--- a/classes/system
+++ b/classes/system
@@ -1 +1 @@
-Subproject commit 9f2c5596c833df0f9c72033bd6d6ae39d5f2fa81
+Subproject commit be1bc7be3d43107a8d0fd747fb432bce34f16d30