Cleanup relation drawing code

Change-Id: I4d4b939a2e3888a001d03c0bf60d6dde9c132a95
diff --git a/dev/demo/relationsdemo.js b/dev/demo/relationsdemo.js
index 200894e..0ffbc8a 100644
--- a/dev/demo/relationsdemo.js
+++ b/dev/demo/relationsdemo.js
@@ -156,7 +156,7 @@
     .addRel({ start: 1, end: 2, label: "c", direction: "bi"   })
     .addRel({ start: 0, end: 2, label: "dreizehn", direction: "uni" })
     .addRel({ start: [2,4], end: 5, label: "e", direction: "uni" })
-    .addRel({ start: [5,6], end: 7, label: "g", direction: "uni" })
+    .addRel({ start: [5,6], end: 7, direction: "uni" })
     .addRel({ start: 4, end: [6,8], label: "f", direction: "bi" })
   ;