clearfog: remove leftovers from the old board layouts

Change-Id: Id717501d959e8c8b7d20b6105e79abf69f7cb91f
diff --git a/board/czechlight/clearfog/sdn-roadm-clearfog.dtsi b/board/czechlight/clearfog/sdn-roadm-clearfog.dtsi
index dfaa15c..9084eaf 100644
--- a/board/czechlight/clearfog/sdn-roadm-clearfog.dtsi
+++ b/board/czechlight/clearfog/sdn-roadm-clearfog.dtsi
@@ -5,8 +5,6 @@
 };
 
 #undef CLEARFOG_PMBUS_BITBANG
-#define IFACE_V_1_0 // v1.0, a first prototype
-//#undef IFACE_V_1_0 // v1.0.1, the second iteration
 
 / {
 	clocks {