diff --git a/mappings/none/sy.mapping b/mappings/none/sy.mapping
deleted file mode 100644
index 887d0a2196..0000000000
--- a/mappings/none/sy.mapping
+++ /dev/null
@@ -1,3 +0,0 @@
-CLASS none/sy
-	METHOD a deserializeEntityTag (Lnone/dt;)V
-	METHOD b serializeEntityTag (Lnone/dt;)V